Rabadhka Styrene-butadiene (SBR) waa caag-samaynta ugu badan ee la isticmaalo waxaana lagu soo saari karaa kobolymerization ee butadiene (75%) iyo styrene (25%) iyadoo la isticmaalayo curiyeyaasha xagjirka ah ee xorta ah.Copolymer random ayaa la helay.Qaab-dhismeedka yar-yar ee polymer-ku waa 60%-68% trans, 14%-19% cis, iyo 17%-21% 1,2-.Hababka qoyan waxaa sida caadiga ah loo isticmaalaa in lagu garto polymers polybutadiene iyo copolymers.NMR-goboleed adag wuxuu bixiyaa hab ku habboon oo lagu go'aamiyo qaab-dhismeedka yar yar ee polymer.
Waqtigan xaadirka ah, SBR badan ayaa la soo saaraa iyada oo la isku koobaynayo labada monomer oo leh anionic ama kicinta isuduwidda.Copolymer-ka la sameeyay waxa uu leeyahay sifooyin farsamo oo ka wanaagsan iyo qaybinta miisaanka kelli oo cidhiidhi ah.Copolymer random oo leh isku xigxig la dalbaday ayaa sidoo kale lagu samayn karaa xal iyadoo la isticmaalayo butyl-lithium, waase haddii labada monomer si tartiib ah loo dallaco.Copolymers-ka xannibaadda ee butadiene iyo styrene ayaa laga yaabaa in lagu soo saaro xal iyadoo la isticmaalayo iskudubarid ama kiciyayaal anionic ah.Butadiene polymerizes marka hore ilaa la wada baabbi'iyo, ka dibna styrene bilaabay inuu polymerize.SBR oo ay soo saartay iskudubarid kiciyayaal ayaa leh xoog xajin oo ka wanaagsan kan ay soo saareen kuwa bilaabay xagjirka xorta ah.
Isticmaalka ugu weyn ee SBR waa wax soo saarka taayirka.Isticmaalka kale waxaa ka mid ah kabo, dahaarka, roogaga lagu xidho, iyo xabagta.
Muuqaal
Xiro caabbinta, caabbinta gabowga, caabbinta biyaha iyo cidhiidhiga hawada ayaa ka fiican caagga dabiiciga ah, halka adhesion, elasticity iyo deformation calorific qiimaha ay ka hooseeyaan caagga dabiiciga ah.Styrene butadiene caag ayaa leh sifooyin dhammaystiran oo heersare ah.Waa nooca ugu badan ee caag synthetic ah, wax-soo-saarkiisuna waxa uu ka dhigan yahay 60% caag-samaynta.Qiyaastii 87% awoodda wax-soo-saarka caagga ah ee styrene butadiene ee adduunka ayaa isticmaala polymerization emulsion.Guud ahaan marka la hadlo, styrene butadiene caag inta badan waxaa loola jeedaa emulsion polymerized styrene butadiene caag.Emulsion polymerized styrene butadiene caag sidoo kale waxaa ku jira emulsion heerkulka sare polymerization of butadiene styrene iyo emulsion heerkulka hoose polymerization of butadiene qabow.
Isticmaal
Waxa loo isticmaalaa samaynta caag isbuunyo ah, faybar la dajiyay iyo dhar, sidoo kale loo isticmaalo sida xabag, dahaarka iwm.
Waqtiga boostada: Mar-10-2022