Cov molecule polypropylene muaj cov methyl pawg, uas tuaj yeem muab faib ua isotactic polypropylene, atactic polypropylene thiab syndiotactic polypropylene raws li kev teeb tsa ntawm methyl pawg. Thaum cov methyl pawg tau teeb tsa rau tib sab ntawm cov saw hlau tseem ceeb, nws hu ua isotactic polypropylene; yog tias cov methyl pawg tau faib tawm ntawm ob sab ntawm cov saw hlau tseem ceeb, nws hu ua atactic polypropylene; thaum cov methyl pawg tau teeb tsa hloov pauv ntawm ob sab ntawm cov saw hlau tseem ceeb, nws hu ua syndiotactic. polypropylene. Hauv kev tsim cov polypropylene resin dav dav, cov ntsiab lus ntawm cov qauv isotactic (hu ua isotacticity) yog li 95%, thiab qhov seem yog atactic lossis syndiotactic polypropylene. Cov polypropylene resin tam sim no tsim tawm hauv Suav teb tau faib ua pawg raws li cov ntsuas yaj thiab cov khoom ntxiv.
Atactic polypropylene yog ib yam khoom ntawm kev tsim cov isotactic polypropylene. Atactic polypropylene yog tsim los ntawm kev tsim cov isotactic polypropylene, thiab isotactic polypropylene yog sib cais los ntawm atactic polypropylene los ntawm txoj kev sib cais.
Atactic polypropylene yog ib yam khoom siv thermoplastic uas muaj zog heev thiab muaj zog tensile zoo. Nws kuj tseem tuaj yeem vulcanized zoo li roj hmab ethylene-propylene.
Lub sijhawm tshaj tawm: Lub Ob Hlis-28-2023