Muaj ob lub ntsiab ntawm polypropylene muaj: homopolymers thiab copolymer. Cov copolymer tau muab faib ntxiv rau hauv block copolymer thiab random copolymer.
Txhua qeb haum rau qee cov ntawv thov zoo dua li lwm tus. Polypropylene feem ntau hu ua "steel" ntawm kev lag luam yas vim muaj ntau txoj hauv kev uas nws tuaj yeem hloov kho lossis kho kom zoo tshaj plaws rau lub hom phiaj tshwj xeeb.
Qhov no feem ntau yog ua tiav los ntawm kev qhia tshwj xeeb ntxiv rau nws lossis los ntawm kev tsim nws hauv ib txoj kev tshwj xeeb. Qhov kev hloov pauv no yog ib qho khoom tseem ceeb.
Homopolymer polypropyleneyog ib tug general-purpose qib. Koj tuaj yeem xav txog qhov no zoo li lub xeev qub ntawm cov khoom siv polypropylene.Thaiv copolymerpolypropylene muaj co-monomer units teem nyob rau hauv blocks (uas yog, nyob rau hauv ib tug tsis tu ncua qauv) thiab muaj nyob qhov twg ntawm 5% mus rau 15% ethylene.
Ethylene txhim kho qee yam khoom, zoo li kev cuam tshuam kev tiv thaiv thaum lwm cov tshuaj ntxiv txhim kho lwm yam khoom.
Random copolymerpolypropylene - as opposed to block copolymer polypropylene - muaj cov co-monomer units teem nyob rau hauv tsis xwm yeem los yog random qauv raws li polypropylene molecule.
Lawv feem ntau suav nrog nyob qhov twg ntawm 1% mus rau 7% ethylene thiab raug xaiv rau cov ntawv thov uas xav tau cov khoom lag luam ntau dua, pom tseeb dua.
Post lub sij hawm: Dec-05-2022