Ubwoko bwa polypropilene.

Molekile ya polypropilene irimo amatsinda ya methyl, ashobora kugabanywamo isotactic polypropylene, polotropylene atactique na syndiotactic polypropylene ukurikije gahunda ya methyl.Iyo amatsinda ya methyl atunganijwe kuruhande rumwe rwumunyururu nyamukuru, byitwa isotactic polypropylene;niba amatsinda ya methyl akwirakwijwe ku mpande zombi z'urunigi nyamukuru, yitwa atactic polypropylene;iyo methyl matsinda atunganijwe muburyo bubiri bwurunigi nyamukuru, byitwa syndiotactic.polipropilene.Mu musaruro rusange wa polypropilene resin, ibikubiye mu miterere ya isotactique (bita isotacticity) bigera kuri 95%, naho ibindi ni atipiki cyangwa syndiotactique polypropilene.Ibisigazwa bya polypropilene muri iki gihe bikorerwa mu Bushinwa bishyirwa mu byiciro hakurikijwe ibipimo byashongeshejwe hamwe n’ibindi byongeweho.

Atactic polypropilene nigicuruzwa cyumusaruro wa isotactic polypropylene.Polypropilene ya Atactique ikorwa mugukora isotactique polypropilene, kandi polotropilene isotactique itandukanijwe na polipropile ya atactique hakoreshejwe uburyo bwo gutandukana.

Atactic polypropylene nigikoresho cyoroshye cyane cya termoplastique gifite imbaraga zingana.Irashobora kandi guhindagurika nka rubber ya Ethylene-propylene.