Muaj pes tsawg hom polypropylene muaj
Lub polymer uas ua los ntawm cov tshuaj polymerization ntawm propylene hu ua polypropylene, lossis PP.Polypropylene hais zoo li dawb wax, ntais thiab pob tshab me ntsis ntxiv dua li ntawm polyethylene.Nws yog flammable, melts thiab drips li nws Burns thiab muab tua tsis hnov tsw ntawm cov roj.Raws li tus qhov sib txawv ntawm qhov kev sib txuas ntawm sab methyl pawg, polypropylene faib rau isogameter, interstitial gauge thiab random substance nyob rau hauv lub ntsiab configuration. Industrial polypropylene yog tsim los ntawm 94 ~ 98.5% isotactic, thiab nws cov ntsiab lus ntawm isotic tshuaj (isometric degree) feem ntau approximated los ntawm qhov feem pua ntawm cov polymers (isometric index) insoluble hauv boiling n-heptane.The lub teb chaws tus qauv GB / t2412-80 muab ib txoj kev rau kev txiav txim ntawm polypropylene index.Random polypropylene feem ntau yog by-product sib cais thaum lub zeem muag ntawm industrial PP los ntawm txoj kev tov.Nws yog ib yam khoom uas zoo li roj hmab xws li tsis tuaj yeem siv los ua cov khoom.Nws yog feem ntau siv ua Cov tshuaj polypropylene uas yog polybopylene ua tus tswv masterbatch.Most industrial polypropylene tau los ntawm polymerization ntawm tsuas yog ib hom propylene monomer, uas yog, homogeneous polypropylene.Tej zaum ib tus nqi ntawm ethylene monomer (lossis butene-1, hexene-1, etc.) yog qhia mus rau copolymerize polypropylene nyob rau hauv tus txheej txheem ntawm polypropylene synthesis kom tau raws li ntau cov kev kawm ntawv.Qhov feem ntau tseem ceeb copolymer ntawm polypropylene yog copolymer ntawm ethylene thiab propylene.