Awọn ohun elo polypropylene ni awọn ẹgbẹ methyl, eyiti o le pin si isotactic polypropylene, polypropylene atactic ati polypropylene syndiotactic ni ibamu si iṣeto ti awọn ẹgbẹ methyl.Nigbati awọn ẹgbẹ methyl ti ṣeto ni ẹgbẹ kanna ti pq akọkọ, a pe ni polypropylene isotactic;ti awọn ẹgbẹ methyl ba pin laileto ni ẹgbẹ mejeeji ti pq akọkọ, a pe ni polypropylene atactic;nigbati awọn ẹgbẹ methyl ti wa ni idayatọ ni omiiran ni ẹgbẹ mejeeji ti pq akọkọ, a pe ni syndiotactic.polypropylene.Ninu iṣelọpọ gbogbogbo ti resini polypropylene, akoonu ti eto isotactic (ti a npe ni isotacticity) jẹ nipa 95%, ati pe iyoku jẹ atactic tabi polypropylene syndiotactic.Resini polypropylene ti a ṣe lọwọlọwọ ni Ilu China jẹ ipin ni ibamu si atọka yo ati awọn afikun ti a ṣafikun.
Atactic polypropylene jẹ nipasẹ-ọja ti isejade ti isotactic polypropylene.Atactic polypropylene jẹ iṣelọpọ ni iṣelọpọ ti polypropylene isotactic, ati pe polypropylene isotactic ti yapa kuro ninu polypropylene atactic nipasẹ ọna iyapa.
Atactic polypropylene jẹ ohun elo thermoplastic rirọ pupọ pẹlu agbara fifẹ to dara.O tun le jẹ vulcanized bi ethylene-propylene roba.
Akoko ifiweranṣẹ: Kínní-28-2023