Roba Styrene-butadiene (SBR) jẹ rọba sintetiki ti a lo julọ ati pe o le ṣejade nipasẹ copolymerization ti butadiene (75%) ati styrene (25%) ni lilo awọn olupilẹṣẹ radical ọfẹ.A gba copolymer laileto.Awọn microstructure ti polima jẹ 60% –68% trans, 14% –19% cis, ati 17% –21% 1,2-.Awọn ọna tutu jẹ deede lo lati ṣe apejuwe awọn polima polybutadiene ati awọn copolymers.NMR-ipinle ri to n pese ọna irọrun diẹ sii lati pinnu microstructure polima.
Lọwọlọwọ, SBR diẹ sii ni a ṣe nipasẹ pipọpọ awọn monomers meji pẹlu anionic tabi awọn ayase isọdọkan.Copolymer ti o ṣẹda ni awọn ohun-ini ẹrọ ti o dara julọ ati pinpin iwuwo molikula dín.Aileto copolymer pẹlu aṣẹ ọkọọkan le tun ti wa ni ṣe ni ojutu lilo butyl-lithium, pese wipe awọn meji monomers ti wa ni agbara laiyara.Dina copolymers ti butadiene ati styrene le jẹ iṣelọpọ ni ojutu ni lilo isọdọkan tabi awọn ayase anionic.Butadiene polymerizes akọkọ titi o fi jẹ, lẹhinna styrene bẹrẹ lati ṣe polymerize.SBR ti a ṣe nipasẹ awọn ayase isọdọkan ni agbara fifẹ to dara julọ ju eyiti a ṣe nipasẹ awọn olupilẹṣẹ radical ọfẹ.
Lilo akọkọ ti SBR jẹ fun iṣelọpọ taya.Awọn lilo miiran pẹlu bata ẹsẹ, awọn aṣọ ibora, atilẹyin capeti, ati awọn alemora.
Ẹya ara ẹrọ
Wọ resistance, ti ogbo resistance, omi resistance ati air wiwọ dara ju adayeba roba, nigba ti adhesion, elasticity ati abuku calorific iye wa ni kekere ju adayeba roba.Styren butadiene roba ni o ni o tayọ okeerẹ-ini.O jẹ awọn ti o tobi julo ti roba sintetiki, ati awọn oniwe-jade iroyin fun 60% ti sintetiki roba.Nipa 87% ti styrene butadiene roba agbara gbóògì ni agbaye nlo emulsion polymerization.Ni gbogbogbo, rọba styrene butadiene n tọka si emulsion polymerized styrene butadiene roba.Emulsion polymerized styrene butadiene roba tun pẹlu iwọn otutu emulsion polymerization ti butadiene styrene ati iwọn kekere emulsion polymerization ti butadiene tutu.
Lo
Ti a lo fun ṣiṣe rọba kanrinkan, okun impregnated ati fabric, tun lo bi alemora, bo ati be be lo.
Akoko ifiweranṣẹ: Oṣu Kẹta-10-2022