Polypropylene molecules muaj methyl pawg, uas tuaj yeem muab faib ua isotactic polypropylene, atactic polypropylene thiab syndiotactic polypropylene raws li kev npaj ntawm methyl pawg. Thaum cov methyl pawg tau teem rau tib sab ntawm cov saw tseem ceeb, nws yog hu ua isotactic polypropylene; yog tias cov methyl pawg tau muab faib rau ntawm ob sab ntawm cov saw tseem ceeb, nws yog hu ua atactic polypropylene; thaum cov methyl pawg tau teem ua ke ntawm ob sab ntawm cov saw tseem ceeb, nws yog hu ua syndiotactic. polypropylene. Nyob rau hauv dav dav ntawm polypropylene cob, cov ntsiab lus ntawm isotactic qauv (hu ua isotacticity) yog hais txog 95%, thiab tus so yog atactic los yog syndiotactic polypropylene. Cov polypropylene resin tam sim no tsim nyob rau hauv Suav teb yog cais raws li lub melt index thiab cov additives ntxiv.
Atactic polypropylene yog ib qho khoom los ntawm kev tsim cov isotactic polypropylene. Atactic polypropylene yog tsim nyob rau hauv zus tau tej cov isotactic polypropylene, thiab isotactic polypropylene yog cais los ntawm atactic polypropylene los ntawm ib tug sib cais txoj kev.
Atactic polypropylene yog cov khoom siv thermoplastic zoo heev nrog lub zog tensile zoo. Nws tuaj yeem ua vulcanized zoo li ethylene-propylene roj hmab.
Post lub sij hawm: Feb-28-2023