Listing 100 petrochemicals, their properties, chemical formulas, and formulation procedures is quite extensive. However, I can provide a comprehensive list of 100 key petrochemicals that are in high demand, along with detailed information about each. If you need more than this, please let me know, and I can continue with additional ones.

1. **Ethylene (C₂H₄)** **Properties**: Colorless gas with a sweet odor. **Uses**: Production of polyethylene, ethylene oxide, and ethylbenzene. **Formulation Procedure**: Produced by steam cracking of hydrocarbons such as ethane, propane, butane, and naphtha.

2. **Propylene (C₃H₆)** **Properties**: Colorless gas with a faint petroleum-like odor. **Uses**: Production of polypropylene, acrylonitrile, and propylene oxide. **Formulation Procedure**: Obtained through steam cracking and catalytic cracking of hydrocarbons.

3. *Benzene (C₆H₆)* **Properties**: Colorless liquid with a sweet odor. **Uses**: Production of styrene, phenol, and cyclohexane. **Formulation Procedure**: Produced from catalytic reforming of naphtha and toluene hydrodealkylation.

4. *Toluene (C₇H₈)* *Properties*: Colorless liquid with a sweet, pungent smell. *Uses*: Production of benzene, toluene diisocyanate (TDI), and solvents. *Formulation Procedure*: Obtained as a byproduct of gasoline production and in the toluene disproportionation process.

5. **Xylene (C₈H₁₀)** **Properties**: Colorless liquid with a sweet smell. **Uses**: Production of terephthalic acid, solvents, and as a fuel additive. **Formulation Procedure**: Extracted from the catalytic reforming of naphtha.

6. **Styrene (C₈H₈)** **Properties**: Colorless liquid with a sweet smell. **Uses**: Production of polystyrene, ABS, and styrene-butadiene rubber. **Formulation Procedure**: Produced by dehydrogenation of ethylbenzene.

7. **Ethylene Oxide (C₂H₄O)** **Properties**: Colorless gas or liquid with a sweet odor. **Uses**: Production of ethylene glycol, surfactants, and ethanolamines. **Formulation Procedure**: Produced by the oxidation of ethylene with oxygen or air.

8. **Ethylene Glycol (C₂H₆O₂)** **Properties**: Colorless, odorless, sweet-tasting liquid. **Uses**: Antifreeze, polyester fibers, and resins. **Formulation Procedure**: Produced from ethylene oxide and water.

9. **Propylene Oxide (C₃H₆O)** **Properties**: Colorless, volatile liquid with an ether-like odor. **Uses**: Production of polyurethane, glycol ethers, and propylene glycol. **Formulation Procedure**: Produced by chlorohydrin process or oxidation of propylene.

10. **Propylene Glycol (C₃H₈O₂)** **Properties**: Colorless, odorless, slightly sweet-tasting liquid. **Uses**: Antifreeze, food additives, pharmaceuticals, and cosmetics. **Formulation Procedure**: Produced from propylene oxide and water.

11. **Methanol (CH₃OH)** **Properties**: Colorless, volatile liquid with a slightly sweet odor. **Uses**: Fuel, formaldehyde production, and as a solvent. **Formulation Procedure**: Produced from synthesis gas (carbon monoxide and hydrogen).

12. **Formaldehyde (CH₂O)** **Properties**: Colorless gas with a pungent odor. **Uses**: Production of resins, plastics, and as a disinfectant. **Formulation Procedure**: Produced by the oxidation of methanol.

13. **Acrylonitrile (C₃H₃N)** **Properties**: Colorless liquid with a pungent odor. **Uses**: Production of acrylic fibers, ABS, and nitrile rubber. **Formulation Procedure**: Produced by ammoxidation of propylene.

14. **Butadiene (C₄H₆)** **Properties**: Colorless gas with a mild aromatic odor. **Uses**: Production of synthetic rubber, ABS, and nylon. **Formulation Procedure**: Produced by steam cracking of hydrocarbons.

15. **Vinyl Chloride (C₂H₃Cl)** **Properties**: Colorless gas with a sweet odor. **Uses**: Production of PVC (polyvinyl chloride). **Formulation Procedure**: Produced by the chlorination of ethylene.

16. **Bisphenol A (C₁₅H₁₆O₂)** **Properties**: White solid with a slight phenolic odor. **Uses**: Production of polycarbonate plastics and epoxy resins. **Formulation Procedure**: Produced by condensation of phenol and acetone.

17. **Phthalic Anhydride (C₈H₄O₃)** **Properties**: White solid with a slight odor. **Uses**: Production of plasticizers, resins, and dyes. **Formulation Procedure**: Produced by the oxidation of ortho-xylene or naphthalene.

18. **Cumene (C₉H₁₂)** **Properties**: Colorless liquid with a sharp, penetrating odor. **Uses**: Production of phenol and acetone. **Formulation Procedure**: Produced by the alkylation of benzene with propylene.

19. **Cyclohexane (C₆H₁₂)** **Properties**: Colorless liquid with a mild sweet odor. **Uses**: Production of adipic acid, caprolactam, and nylon. **Formulation Procedure**: Produced by hydrogenation of benzene.

20. **Terephthalic Acid (C₈H₆O₄)** **Properties**: White crystalline powder. **Uses**: Production of PET (polyethylene terephthalate) and polyester fibers. **Formulation Procedure**: Produced by oxidation of p-xylene.

For each of these petrochemicals, the production process often involves sophisticated industrial methods and specific catalysts to achieve high efficiency and purity. Detailed formulation procedures would typically include multiple steps, optimized conditions, and safety considerations that are beyond the scope of this summary but can be found in industrial chemistry textbooks and technical manuals. If you require more specific details on formulation procedures or additional petrochemicals, please let me know!

21. **Ammonia (NH₃)** **Properties**: Colorless gas with a pungent odor. **Uses**: Fertilizers, nitric acid production, and refrigeration. **Formulation Procedure**: Produced by the Haber-Bosch process, combining nitrogen and hydrogen gases under high pressure and temperature with an iron catalyst.

22. **Urea (CO(NH₂)₂)** **Properties**: White crystalline solid. **Uses**: Fertilizers, animal feed, and resins. **Formulation Procedure**: Produced by reacting ammonia and carbon dioxide under high pressure and temperature.

23. **Nitric Acid (HNO₃)** **Properties**: Colorless to yellowish liquid with a pungent odor. **Uses**: Fertilizers, explosives, and etching. **Formulation Procedure**: Produced by the Ostwald process, where ammonia is oxidized to nitric oxide, which is further oxidized to nitrogen dioxide and absorbed in water.

24. **Butanol (C₄H₉OH)** **Properties**: Colorless liquid with a characteristic alcohol odor. **Uses**: Solvents, plasticizers, and fuel. **Formulation Procedure**: Produced by the fermentation of sugars (bio-butanol) or by the oxo process, reacting propylene with synthesis gas.

25. **Acetone (C₃H₆O)** **Properties**: Colorless, volatile liquid with a sweet odor. **Uses**: Solvents, plastics, and pharmaceuticals. **Formulation Procedure**: Produced by the cumene process, where cumene hydroperoxide is cleaved to yield acetone and phenol.

26. **Phenol (C₆H₅OH)** **Properties**: Colorless to white crystalline solid with a distinct odor. **Uses**: Resins, plastics, and pharmaceuticals. **Formulation Procedure**: Produced from cumene by oxidation to cumene hydroperoxide, followed by acid-catalyzed cleavage to phenol and acetone.

27. **Acetic Acid (CH₃COOH)** **Properties**: Colorless liquid with a pungent smell. **Uses**: Vinegar, solvents, and chemical intermediates. **Formulation Procedure**: Produced by methanol carbonylation (Monsanto process) or by the oxidation of acetaldehyde.

28. **Methyl Tert-Butyl Ether (MTBE) (C₅H₁₂O)** **Properties**: Colorless liquid with a mild odor. **Uses**: Fuel additive to increase octane number. **Formulation Procedure**: Produced by the reaction of methanol and isobutylene.

29. **Dimethyl Ether (DME) (C₂H₆O)** **Properties**: Colorless gas with a faint ether-like odor. **Uses**: Propellant, refrigerant, and diesel fuel substitute. **Formulation Procedure**: Produced by dehydration of methanol.

30. **Hexane (C₆H₁₄)** **Properties**: Colorless liquid with a mild odor. **Uses**: Solvents, extraction of vegetable oils, and adhesives. **Formulation Procedure**: Extracted from petroleum refining.

31. **Formic Acid (HCOOH)** **Properties**: Colorless liquid with a pungent odor. **Uses**: Preservatives, leather production, and cleaning products. **Formulation Procedure**: Produced by the hydrolysis of methyl formate or by carbon monoxide and methanol reaction.

32. **Butyric Acid (C₄H₈O₂)** **Properties**: Colorless liquid with a rancid odor. **Uses**: Flavorings, perfumes, and pharmaceuticals. **Formulation Procedure**: Produced by fermentation of carbohydrates.

33. **Isopropanol (C₃H₈O)** **Properties**: Colorless liquid with a strong alcohol odor. **Uses**: Solvents, disinfectants, and cleaners. **Formulation Procedure**: Produced by hydration of propylene.

34. **Toluene Diisocyanate (TDI) (C₉H₆N₂O₂)** **Properties**: Colorless to pale yellow liquid with a sharp odor. **Uses**: Production of polyurethane foams. **Formulation Procedure**: Produced by nitration of toluene followed by hydrogenation and phosgenation.

35. **Methacrylic Acid (C₄H₆O₂)** **Properties**: Colorless liquid with an acrid odor. **Uses**: Production of acrylic resins and coatings. **Formulation Procedure**: Produced by the oxidation of isobutylene or methyl methacrylate hydrolysis.

36. **Methyl Methacrylate (C₅H₈O₂)** **Properties**: Colorless liquid with a fruity odor. **Uses**: Production of polymethyl methacrylate (PMMA) and acrylic sheets. **Formulation Procedure**: Produced by acetone cyanohydrin process or by direct oxidation of isobutylene.

37. **Maleic Anhydride (C₄H₂O₃)** **Properties**: White crystalline solid with a sharp odor. **Uses**: Production of unsaturated polyester resins, fumaric acid, and lubricants. **Formulation Procedure**: Produced by oxidation of benzene or butane.

38. **Caprolactam (C₆H₁₁NO)** **Properties**: White crystalline solid. **Uses**: Production of nylon-6 fibers and resins. **Formulation Procedure**: Produced by cyclohexanone oxime rearrangement.

39. **Phosgene (COCl₂)** **Properties**: Colorless gas with a suffocating odor. **Uses**: Production of isocyanates and polycarbonate plastics. **Formulation Procedure**: Produced by reaction of carbon monoxide with chlorine gas.

40. **P-Xylene (C₈H₁₀)** **Properties**: Colorless liquid with a sweet odor. **Uses**: Production of terephthalic acid and dimethyl terephthalate. **Formulation Procedure**: Extracted from catalytic reforming of naphtha.

41. **Adipic Acid (C₆H₁₀O₄)** **Properties**: White crystalline solid with a slight odor. **Uses**: Production of nylon-6,6, polyurethane, and plasticizers. **Formulation Procedure**: Produced by oxidation of cyclohexane or cyclohexanone.

42. **Acrylamide (C₃H₅NO)** **Properties**: White crystalline solid. **Uses**: Production of polyacrylamide for water treatment and paper making. **Formulation Procedure**: Produced by hydration of acrylonitrile.

43. **Aniline (C₆H₅NH₂)** **Properties**: Colorless to slightly yellow liquid with a characteristic odor. **Uses**: Production of MDI, rubber processing chemicals, and dyes. **Formulation Procedure**: Produced by hydrogenation of nitrobenzene.

44. **Vinyl Acetate Monomer (VAM) (C₄H₆O₂)** **Properties**: Colorless liquid with a sweet, fruity odor. **Uses**: Production of polyvinyl acetate and polyvinyl alcohol. **Formulation Procedure**: Produced by reacting ethylene and acetic acid with oxygen in the presence of a palladium catalyst.

45. **1,3-Butadiene (C₄H₆)** **Properties**: Colorless gas with a mild aromatic odor. **Uses**: Production of synthetic rubber, ABS resins, and nylon. **Formulation Procedure**: Extracted as a byproduct of ethylene production from steam cracking of hydrocarbons.

46. **Hexamethylenediamine (HMDA) (C₆H₁₆N₂)** **Properties**: Colorless liquid with an amine odor. **Uses**: Production of nylon-6,6 and coatings. **Formulation Procedure**: Produced by hydrogenation of adiponitrile.

47. **Ethylbenzene (C₈H₁₀)** **Properties**: Colorless liquid with an aromatic odor. **Uses**: Production of styrene. **Formulation Procedure**: Produced by alkylation of benzene with ethylene.

48. **Methyl Isobutyl Ketone (MIBK) (C₆H₁₂O)** **Properties**: Colorless liquid with a mild odor. **Uses**: Solvents, rubber processing, and coatings. **Formulation Procedure**: Produced by condensation of acetone and subsequent hydrogenation.

49. **Pentaerythritol (C₅H₁₂O₄)** **Properties**: White crystalline solid. **Uses**: Production of alkyd resins,

explosives

, and lubricants. **Formulation Procedure**: Produced by the reaction of formaldehyde and acetaldehyde in the presence of a base.

50. **Triethylene Glycol (C₆H₁₄O₄)** **Properties**: Colorless, viscous liquid with a slight odor. **Uses**: Dehydrating agents, plasticizers, and solvents. **Formulation Procedure**: Produced by the partial hydrolysis of ethylene oxide.

51. **Diethylene Glycol (C₄H₁₀O₃)** **Properties**: Colorless, viscous liquid with a slight sweet taste. **Uses**: Plasticizers, solvents, and antifreeze. **Formulation Procedure**: Produced by the hydrolysis of ethylene oxide.

52. **Monoethylene Glycol (MEG) (C₂H₆O₂)** **Properties**: Colorless, odorless, syrupy liquid. **Uses**: Antifreeze, polyester fibers, and resins. **Formulation Procedure**: Produced by the oxidation of ethylene followed by hydration of ethylene oxide.

53. **Naphthalene (C₁₀H₈)** **Properties**: White solid with a characteristic odor. **Uses**: Production of phthalic anhydride, mothballs, and dyes. **Formulation Procedure**: Produced by the distillation of coal tar or petroleum.

54. **Carbon Black** **Properties**: Fine black powder. **Uses**: Pigment in inks, reinforcement in rubber, and in plastics. **Formulation Procedure**: Produced by the incomplete combustion of heavy petroleum products.

55. **Isobutylene (C₄H₈)** **Properties**: Colorless gas with a slight petroleum-like odor. **Uses**: Production of MTBE, butyl rubber, and polymers. **Formulation Procedure**: Extracted from refinery gas streams.

56. **Bisphenol F (BPF) (C₁₃H₁₂O₂)** **Properties**: White to pale yellow solid. **Uses**: Production of epoxy resins and polycarbonate plastics. **Formulation Procedure**: Produced by the condensation of phenol and formaldehyde.

57. **Cyclohexanone (C₆H₁₀O)** **Properties**: Colorless to pale yellow liquid with a peppermint-like odor. **Uses**: Production of nylon, solvents, and coatings. **Formulation Procedure**: Produced by the oxidation of cyclohexane.

58. **Epichlorohydrin (C₃H₅ClO)** **Properties**: Colorless liquid with a pungent, chloroform-like odor. **Uses**: Production of epoxy resins, glycerol, and elastomers. **Formulation Procedure**: Produced by the chlorohydrination of propylene followed by dehydrochlorination.

59. **Methyl Tertiary-Butyl Ether (MTBE) (C₅H₁₂O)** **Properties**: Colorless liquid with a mild odor. **Uses**: Fuel additive to increase octane number. **Formulation Procedure**: Produced by the reaction of methanol and isobutylene.

60. **Ethylene Dichloride (C₂H₄Cl₂)** **Properties**: Colorless liquid with a chloroform-like odor. **Uses**: Production of vinyl chloride and as a solvent. **Formulation Procedure**: Produced by the chlorination of ethylene.

61. **Tetrachloroethylene (C₂Cl₄)** **Properties**: Colorless liquid with a mild, sweet odor. **Uses**: Dry cleaning solvent, degreasing metals, and chemical intermediates. **Formulation Procedure**: Produced by chlorination of hydrocarbons or thermal decomposition of hexachloroethane.

62. **Methylamine (CH₃NH₂)** **Properties**: Colorless gas with an ammonia-like odor. **Uses**: Production of pesticides, pharmaceuticals, and solvents. **Formulation Procedure**: Produced by the reaction of methanol and ammonia over a catalyst.

63. **Dimethylamine (C₂H₇N)** **Properties**: Colorless gas with an ammonia-like odor. **Uses**: Production of solvents, pesticides, and pharmaceuticals. **Formulation Procedure**: Produced by the reaction of methanol and ammonia.

64. **Triethylamine (C₆H₁₅N)** **Properties**: Colorless liquid with a strong fishy odor. **Uses**: Catalyst in polymerization, curing agent for resins, and in pharmaceuticals. **Formulation Procedure**: Produced by alkylation of ammonia with ethanol.

65. **Acetylene (C₂H₂)** **Properties**: Colorless gas with a faint garlic-like odor. **Uses**: Welding, cutting, and as a raw material for chemicals. **Formulation Procedure**: Produced by the reaction of calcium carbide with water.

66. **Hydrogen Peroxide (H₂O₂)** **Properties**: Colorless liquid with a slightly sharp odor. **Uses**: Bleaching agent, disinfectant, and oxidizer. **Formulation Procedure**: Produced by the anthraquinone process.

67. **Perchloroethylene (C₂Cl₄)** **Properties**: Colorless liquid with a mild, sweet odor. **Uses**: Dry cleaning solvent, degreasing metals, and chemical intermediates. **Formulation Procedure**: Produced by chlorination of hydrocarbons or thermal decomposition of hexachloroethane.

68. **Sodium Hydroxide (NaOH)** **Properties**: White solid. **Uses**: Soap making, chemical manufacturing, and water treatment. **Formulation Procedure**: Produced by electrolysis of sodium chloride solution (chloralkali process).

69. **Potassium Hydroxide (KOH)** **Properties**: White solid. **Uses**: Soap making, fertilizers, and batteries. **Formulation Procedure**: Produced by electrolysis of potassium chloride solution.

70. **Ethyl Acetate (C₄H₈O₂)** **Properties**: Colorless liquid with a sweet, fruity odor. **Uses**: Solvent for paints, coatings, and adhesives. **Formulation Procedure**: Produced by the esterification of ethanol with acetic acid.

71. **Tetrahydrofuran (THF) (C₄H₈O)** **Properties**: Colorless liquid with an ether-like odor. **Uses**: Solvent for polymers, starting material for various chemicals. **Formulation Procedure**: Produced by the hydrogenation of furan or the dehydration of 1,4-butanediol.

72. **Hydrofluoric Acid (HF)** **Properties**: Colorless liquid or gas with a strong, irritating odor. **Uses**: Glass etching, metal cleaning, and fluorine production. **Formulation Procedure**: Produced by the reaction of sulfuric acid with fluorite (calcium fluoride).

73. **Ammonium Nitrate (NH₄NO₃)** **Properties**: White crystalline solid. **Uses**: Fertilizers and

explosives

. **Formulation Procedure**: Produced by the reaction of ammonia with nitric acid.

74. **Polyvinyl Alcohol (PVA) (C₂H₄O)n** **Properties**: White to cream-colored granular powder. **Uses**: Adhesives, textile sizing, and coatings. **Formulation Procedure**: Produced by the polymerization of vinyl acetate followed by hydrolysis.

75. **Polystyrene (PS) (C₈H₈)n** **Properties**: Clear, hard, brittle solid. **Uses**: Packaging, disposable cups, and insulation. **Formulation Procedure**: Produced by the polymerization of styrene.

76. **Polyethylene (PE) (C₂H₄)n** **Properties**: Translucent, tough, and flexible solid. **Uses**: Packaging, containers, and pipes. **Formulation Procedure**: Produced by the polymerization of ethylene.

77. **Polypropylene (PP) (C₃H₆)n** **Properties**: Tough, rigid, and flexible solid. **Uses**: Packaging, textiles, and automotive parts. **Formulation Procedure**: Produced by the polymerization of propylene.

78. **Polyvinyl Chloride (PVC) (C₂H₃Cl)n** **Properties**: Rigid or flexible solid. **Uses**: Pipes, cable insulation, and clothing. **Formulation Procedure**: Produced by the polymerization of vinyl chloride.

79. **Polytetrafluoroethylene (PTFE) (C₂F₄)n** **Properties**: Waxy, white solid. **Uses**: Non-stick coatings, gaskets, and bearings. **Formulation Procedure**: Produced by the polymerization of tetrafluoroethylene.

80. **Polycarbonate (PC) (C₁₅H₁₆O₂)n** **Properties**: Transparent, strong, and impact-resistant solid. **Uses**: Lenses, electronic components, and safety equipment. **Formulation Procedure**: Produced by the reaction of bisphenol A with phosgene.

81. **Polylactic Acid (PLA) (C₃H₄O₂)n** **Properties**: Transparent, biodegradable solid. **Uses**: Packaging, biomedical devices, and 3D printing. **Formulation Procedure**: Produced by the polymerization of lactic acid or lactide.

82. **Polyethylene Terephthalate (PET) (C₁₀H₈O₄)n** **Properties**: Strong, transparent, and lightweight solid. **Uses**: Bottles, fibers, and food packaging. **Formulation Procedure**: Produced by the polymerization of ethylene glycol and terephthalic acid.

83. **Polymethyl Methacrylate (PMMA) (C₅H₈O₂)n** **Properties**: Transparent, lightweight, and impact-resistant solid. **Uses**: Plexiglass, lenses, and displays. **Formulation Procedure**: Produced by the polymerization of methyl methacrylate.

84. **Styrene-Acrylonitrile (SAN) (C₈H₈·C₃H₃N)n** **Properties**: Clear, tough, and heat-resistant solid. **Uses**: Appliances, automotive parts, and consumer goods. **Formulation Procedure**: Produced by the copolymerization of styrene and acrylonitrile.

85. **Acrylonitrile Butadiene Styrene (ABS) (C₈H₈·C₄H₆·C₃H₃N)n** **Properties**: Strong, impact-resistant, and glossy solid. **Uses**: Automotive parts, electronics, and toys. **Formulation Procedure**: Produced by the copolymerization of acrylonitrile, butadiene, and styrene.

86. **Polyurethane (PU)** **Properties**: Flexible, durable, and resilient foam. **Uses**: Furniture, automotive parts, and insulation. **Formulation Procedure**: Produced by the reaction of polyols with diisocyanates.

87. **Polyethylene Glycol (PEG) (C₂H₄O)n** **Properties**: Viscous liquid or waxy solid. **Uses**: Pharmaceuticals, cosmetics, and lubricants. **Formulation Procedure**: Produced by the polymerization of ethylene oxide.

88. **Polybutadiene (PB) (C₄H₆)n** **Properties**: Elastic, abrasion-resistant solid. **Uses**: Tires, rubber products, and adhesives. **Formulation Procedure**: Produced by the polymerization of butadiene.

89. **Polyvinylidene Chloride (PVDC) (C₂H₂Cl₂)n** **Properties**: Transparent, flexible, and resistant to chemicals. **Uses**: Food packaging, coatings, and films. **Formulation Procedure**: Produced by the polymerization of vinylidene chloride.

90. **Polyether Ether Ketone (PEEK) (C₁₉H₁₂O₃)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Aerospace, medical devices, and electronics. **Formulation Procedure**: Produced by the step-growth polymerization of bisphenol A and difluorobenzophenone.

91. **Polyphenylene Oxide (PPO) (C₈H₆O)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Automotive parts, electrical components, and water filters. **Formulation Procedure**: Produced by the oxidative coupling of phenols.

92. **Polyetherimide (PEI) (C₁₅H₁₀O₂N₂)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Aerospace, medical devices, and electronics. **Formulation Procedure**: Produced by the step-growth polymerization of diamines and dianhydrides.

93. **Polysulfone (PSU) (C₁₄H₁₀O₂S)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Medical devices, plumbing, and automotive parts. **Formulation Procedure**: Produced by the step-growth polymerization of bisphenol A and diphenyl sulfone.

94. **Polyphthalamide (PPA) (C₁₄H₁₂N₂O₂)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Automotive parts, electrical components, and consumer goods. **Formulation Procedure**: Produced by the step-growth polymerization of diamines and phthalic acids.

95. **Polyetherketoneketone (PEKK) (C₁₉H₁₂O₃)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Aerospace, medical devices, and electronics. **Formulation Procedure**: Produced by the step-growth polymerization of bisphenol A and difluorobenzophenone.

96. **Polydimethylsiloxane (PDMS) (C₂H₆OSi)n** **Properties**: Transparent, flexible, and heat-resistant liquid or solid. **Uses**: Medical devices, lubricants, and cosmetics. **Formulation Procedure**: Produced by the polymerization of dimethylsiloxane.

97. **Polytetramethylene Ether Glycol (PTMEG) (C₄H₈O)n** **Properties**: Flexible, elastic, and resilient solid. **Uses**: Spandex fibers, elastomers, and adhesives. **Formulation Procedure**: Produced by the polymerization of tetrahydrofuran.

98. **Polyphenylene Sulfide (PPS) (C₆H₄S)n** **Properties**: High-strength, chemical-resistant solid. **Uses**: Automotive parts, electronics, and industrial applications. **Formulation Procedure**: Produced by the polymerization of p-dichlorobenzene and sodium sulfide.

99. **Polyamide-imide (PAI) (C₁₃H₁₀N₂O₂)n** **Properties**: High-strength, heat-resistant solid. **Uses**: Aerospace, automotive, and electrical components. **Formulation Procedure**: Produced by the polymerization of trimellitic anhydride and aromatic diamines.

100. **Polymethylpentene (PMP) (C₆H₁₂)n** **Properties**: Transparent, lightweight, and heat-resistant solid. **Uses**: Laboratory equipment, food packaging, and medical devices. **Formulation Procedure**: Produced by the polymerization of 4-methyl-1-pentene.