I-rubber ye-Styrene-butadiene (i-SBR) iyona irabha esetyenziswa kakhulu kwaye inokuveliswa nge-copolymerization ye-butadiene (75%) kunye ne-styrene (25%) usebenzisa i-radical initiators yamahhala.I-copolymer engahleliwe ifunyenwe.I-microstructure ye-polymer yi-60% -68% ye-trans, i-14% -19% ye-cis, kunye ne-17% -21% 1,2-.Iindlela ezimanzi ziqhele ukusetyenziswa ukubonisa iipolymers ze-polybutadiene kunye ne-copolymers.I-Solid-state NMR ibonelela ngendlela elula ngakumbi yokumisela i-polymer microstructure.
Okwangoku, ngaphezulu kwe-SBR iveliswa ngokudibanisa iimonomers ezimbini kunye ne-anionic okanye i-coordination catalysts.I-copolymer eyenziweyo ineempawu ezingcono zomatshini kunye nokusabalalisa ubunzima be-molecular.I-copolymer engacwangciswanga enolandelelwano olucwangcisiweyo nayo inokwenziwa kwisisombululo kusetyenziswa i-butyl-lithium, ngaphandle kokuba iimonomers ezimbini zihlawuliswa kancinci.I-block copolymers ye-butadiene kunye ne-styrene inokuveliswa kwisisombululo ngokusebenzisa ukulungelelanisa okanye i-anionic catalysts.I-Butadiene ipholima kuqala ide ityiwe, emva koko i-styrene iqale ukupholima.I-SBR eveliswe zii-catalysts zolungelelwaniso inamandla angcono okuqina kunalawo aveliswa ngabaqalisi beradical simahla.
Olona setyenziso luphambili lwe-SBR kukuvelisa amatayara.Ezinye izinto ezisetyenziswayo ziquka izihlangu, iingubo, iikhaphethi ezixhasayo, kunye nezinto zokuncamathelisa.
Uphawu
Ukumelana nokunxiba, ukumelana nokuguga, ukumelana namanzi kunye nokuqina komoya kungcono kunerabha yendalo, ngelixa ukunamathela, ukuqina kunye nexabiso le-calorific deformation liphantsi kunerubha yendalo.Irabha ye-styrene butadiene ineempawu ezintle ezibanzi.Lolona didi lukhulu lwerabha yokwenziwa, kwaye iziphumo zayo zibalelwa kwi-60% yerabha yokwenziwa.Malunga ne-87% ye-styrene butadiene amandla okuvelisa irabha kwihlabathi isebenzisa i-emulsion polymerization.Ngokuqhelekileyo, irabha ye-styrene butadiene ibhekisa ikakhulu kwi-emulsion polymerized styrene butadiene rubber.I-emulsion polymerized styrene butadiene rubber ikwabandakanya i-emulsion yobushushu obuphezulu bepolymerization ye-butadiene styrene kunye nobushushu obuphantsi be-emulsion polymerization ye-butadiene ebandayo.
Sebenzisa
Isetyenziselwa ukwenza irabha yesipontshi, ifayibha efakiweyo kunye nelaphu, ikwasetyenziswa njengokuncamathelisa, ukugquma njl.
Ixesha lokuposa: Mar-10-2022