Polypropylene | Wikipedia audio article
Channel: wikipedia tts
Date: 02/10/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Polypropylene


00:00:49 1 History
00:01:54 2 Chemical and physical properties
00:02:51 2.1 Mechanical properties
00:04:01 2.2 Thermal properties
00:05:07 2.3 Chemical properties
00:07:07 2.3.1 Molecular structure – tacticity
00:09:10 2.3.2 Crystal structure of polypropylene
00:09:36 2.3.2.1 Isotactic polypropylene (iPP)
00:11:30 2.3.2.2 Syndiotactic polypropylene (sPP)
00:12:01 2.3.2.3 Atactic polypropylene (aPP)
00:13:13 2.3.3 Degradation
00:14:19 2.4 Optical properties
00:14:42 3 Production
00:16:42 3.1 Catalysts
00:20:10 4 Industrial processes
00:21:16 5 Manufacturing from polypropylene
00:23:15 5.1 Biaxially oriented polypropylene (BOPP)
00:24:08 6 Applications
00:31:20 6.1 Clothing
00:33:10 6.2 Medical
00:34:37 6.3 Niche
00:36:07 7 Recycling
00:36:24 8 Repairing
00:38:13 9 Health concerns
00:38:37 10 Combustiblity



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SUMMARY
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Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene.
Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are similar to polyethylene, but it is slightly harder and more heat resistant. It is a white, mechanically rugged material and has a high chemical resistance. Polypropylene is the second-most widely produced commodity plastic (after polyethylene) and it is often used in packaging and labeling. In 2013, the global market for polypropylene was about 55 million tonnes.