| Polypropylene Polypropylene enjoys wide application in technology engineering. This is a synthetic thermoplastic non-polar polymer classified as polyolefin. It is the product of propylene polymerization. Polypropylene is a solid white material with the chemical formula of C3H6. Propylene polymerization results in polypropylene linear molecule whose building blocks include -CH2-CH- bond with CH3 methyl side group. According to the methyl group position in the polymer chain, polypropylenes fall under: atactic polypropylenes whose methyl groups are located randomly at both sides of the polymer chain; syndiotactic polypropylenes whose groups have alternate positions along the chain; and isotactic polypropylenes whose all methyl groups are located on the same side of the polymer chain. Such polypropylenes are 50% more rigid and 25% harder than atactic polypropylenes. Polypropylene's physical, chemical, mechanical and electric properties greatly depend on the macromolecular structure. Polypropylene is marked as double-P both in Cyrillic and Latin alphabet. Polypropylene is a plastic material demonstrating high impact and cross-breaking strength. It is wear-resistant and has good electric insulation properties within wide temperature ranges. It is also chemically stable and water-resistant. Polypropylene products are manufactured based on all thermoplastic material processing technologies. Polypropylene finds wide application in the industry. It is used to produce packaging and ... |
