Irabha ye-styrene-butadiene (SBR) iyirabha yokwenziwa esetshenziswa kakhulu futhi ingakhiqizwa yi-copolymerization ye-butadiene (75%) kanye ne-styrene (25%) kusetshenziswa ama-radical Initiators mahhala.Kutholakala i-copolymer engahleliwe.I-microstructure ye-polymer ingu-60% -68% trans, 14% -19% cis, kanye no-17% -21% 1,2-.Izindlela ezimanzi zivame ukusetshenziselwa ukuveza ama-polybutadiene polymers nama-copolymers.I-Solid-state NMR inikeza indlela elula yokunquma i-polymer microstructure.
Njengamanje, i-SBR eyengeziwe ikhiqizwa ngokuhlanganisa ama-monomers amabili ngama-anionic noma ama-coordination catalysts.I-copolymer eyakhiwe inezinto ezingcono zomshini kanye nokusabalalisa kwesisindo se-molecular.I-copolymer engahleliwe enochungechunge olu-odwe nayo ingenziwa ngesixazululo kusetshenziswa i-butyl-lithium, inqobo nje uma ama-monomer amabili eshajwa kancane.Ama-block copolymers e-butadiene kanye ne-styrene angase akhiqizwe ngesisombululo kusetshenziswa i-coordination noma ama-anionic catalysts.I-Butadiene i-polymerize kuqala ize idliwe, bese i-styrene iqala ukupholisa.I-SBR ekhiqizwe ama-coordination catalysts inamandla angcono okuqina kunalawo akhiqizwa abaqalisi be-free radical.
Ukusetshenziswa okuyinhloko kwe-SBR ukukhiqiza amathayi.Okunye ukusetshenziswa kuhlanganisa izicathulo, okokunamathela, ukusekela ukhaphethi, nezinamatheliso.
Isici
Ukumelana nokugqoka, ukumelana nokuguga, ukumelana namanzi nokucinana komoya kungcono kunerabha yemvelo, kuyilapho ukunamathela, ukunwebeka kanye nenani le-calorific lokuguga liphansi kunerabha yemvelo.Irabha ye-styrene butadiene inezakhiwo ezinhle kakhulu ezibanzi.Iwuhlobo olukhulu kakhulu lwerabha yokwenziwa, futhi okukhiphayo kubala u-60% werabha yokwenziwa.Cishe i-87% yomthamo wokukhiqiza irabha ye-styrene butadiene emhlabeni isebenzisa i-emulsion polymerization.Ngokuvamile, irabha ye-styrene butadiene ikakhulukazi ibhekisela ku-emulsion polymerized styrene butadiene rubber.Irabha ye-emulsion polymerized styrene butadiene nayo ihlanganisa izinga lokushisa eliphezulu le-emulsion polymerization ye-butadiene styrene kanye nokushisa okuphansi kwe-emulsion polymerization ye-butadiene ebandayo.
Sebenzisa
Isetshenziselwa ukwenza irabha yesipontshi, i-fiber efakiwe kanye nendwangu, futhi isetshenziswa njenge-adhesive, enamathela njll.
Isikhathi sokuthumela: Mar-10-2022