单词	polypropylene
释义	polypropylene /ˌpɒlɪˈprəʊpɪliːn / noun [mass noun] A synthetic resin which is a polymer of propylene, used chiefly for films, fibres, or moulding materials: high-impact polypropylene [as modifier]: polypropylene underwear... Examples of linear polymers include polyethylene, polyvinyl chloride and polypropylene. Synthetic polymers such as polyethylene and polypropylene are produced by free radical addition reactions. Polyethylene, polypropylene, polystyrene, silicone, and rubber are among the materials that are not responsive to the process.
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