O ituaiga o polypropylene.

O molekiu polypropylene o loʻo i ai vaega methyl, e mafai ona vaevaeina i le polypropylene isotactic, polypropylene atactic ma le polypropylene syndiotactic e tusa ai ma le faʻatulagaga o vaega methyl. A faʻatulaga vaega methyl i le itu lava e tasi o le filifili autu, e taʻua o le polypropylene isotactic; afai e tufatufa faʻafuaseʻi vaega methyl i itu uma e lua o le filifili autu, e taʻua o le polypropylene atactic; a faʻatulaga vaega methyl i itu uma e lua o le filifili autu, e taʻua o le syndiotactic. polypropylene. I le gaosiga lautele o le polypropylene resin, o le aofaʻi o le fausaga isotactic (e taʻua o le isotacticity) e tusa ma le 95%, ma o le vaega o totoe o le atactic poʻo le syndiotactic polypropylene. O le polypropylene resin o loʻo gaosia nei i Saina ua faʻavasegaina e tusa ai ma le faʻasinomaga o le melt ma mea faʻaopoopo na faʻaopoopoina.

O le polypropylene atactic o se oloa e maua mai i le gaosiga o le polypropylene isotactic. O le polypropylene atactic e gaosia i le gaosiga o le polypropylene isotactic, ma o le polypropylene isotactic e vavaeʻeseina mai le polypropylene atactic e ala i se metotia vavaeʻeseina.

O le polypropylene atactic o se mea e matua fetuutuunai ma e malosi tele lona feliuliua'i. E mafai fo'i ona fa'avulina e pei o le ethylene-propylene rubber.