Mitundu ya polypropylene .

Mamolekyu a polypropylene ali ndi magulu a methyl, omwe amatha kugawidwa kukhala isotactic polypropylene, atactic polypropylene ndi syndiotactic polypropylene malinga ndi dongosolo la magulu a methyl. Pamene magulu a methyl akonzedwa kumbali imodzi ya unyolo waukulu, amatchedwa isotactic polypropylene; ngati magulu a methyl amagawidwa mwachisawawa mbali zonse za unyolo waukulu, amatchedwa atactic polypropylene; pamene magulu a methyl asinthidwa mosinthana mbali zonse za unyolo waukulu, amatchedwa syndiotactic. polypropylene. Pakupanga utomoni wa polypropylene, zomwe zili mu isotactic (zotchedwa isotacticity) zimakhala pafupifupi 95%, ndipo zina zonse ndi atactic kapena syndiotactic polypropylene. Utoto wa polypropylene womwe umapangidwa ku China pano umayikidwa molingana ndi ndondomeko yosungunuka ndi zowonjezera zowonjezera.

Atactic polypropylene ndi wopangidwa kuchokera ku isotactic polypropylene. Atactic polypropylene imapangidwa popanga isotactic polypropylene, ndipo isotactic polypropylene imasiyanitsidwa ndi atactic polypropylene ndi njira yolekanitsa.

Atactic polypropylene ndi zinthu zotanuka kwambiri za thermoplastic zomwe zimakhala ndi mphamvu zokhazikika. Itha kutenthedwanso ngati mphira wa ethylene-propylene.