Rabara ea styrene-butadiene (SBR) ke rabara ea maiketsetso e sebelisoang ka ho fetisisa 'me e ka hlahisoa ke copolymerization ea butadiene (75%) le styrene (25%) ka ho sebelisa li-radical tse sa lefelloeng.Ho fumanoa copolymer e sa reroang.The microstructure ea polymer ke 60% -68% trans, 14% -19% cis, le 17% -21% 1,2-.Mekhoa ea metsi e atisa ho sebelisoa ho khetholla polybutadiene polymers le copolymers.Solid-state NMR e fana ka mokhoa o bonolo haholoanyane oa ho tseba sebopeho sa polymer.
Hajoale, SBR e eketsehileng e hlahisoa ka ho kopanya li-monomer tse peli ka li-catalyst tsa anionic kapa tsa coordination.Copolymer e entsoeng e na le thepa e ntle ea mochine le kabo e fokolang ea limolek'hule.Copolymer e sa sebetseng e nang le tatellano e laetsoeng le eona e ka etsoa ka tharollo ho sebelisoa butyl-lithium, ha feela li-monomer tse peli li lefisoa butle.Li-block copolymers tsa butadiene le styrene li ka hlahisoa ka tharollo ka ho sebelisana kapa li-anionic catalysts.Butadiene polymerizes pele ho fihlela e jeoa, ebe styrene e qala ho polymerize.SBR e hlahisoang ke li-catalysts tsa khokahano e na le matla a betere ho feta a hlahisoang ke li-radical tse qalang.
Tšebeliso e kholo ea SBR ke tlhahiso ea mabili.Litšebeliso tse ling li kenyelletsa lieta, lirafshoa, tšehetso ea k'hapete le likhomaretsi.
Sebopeho
Ho hanyetsa ho roala, ho hanyetsa botsofali, ho hanyetsa metsi le ho tiea ha moea ho molemo ho feta rabara ea tlhaho, athe ho khomarela, elasticity le deformation calorific value li tlaase ho feta rabara ea tlhaho.Rabara ea styrene butadiene e na le thepa e ntle e felletseng.Ke mofuta o moholo ka ho fetisisa oa rabara ea maiketsetso, 'me tlhahiso ea eona e etsa 60% ea rabara ea maiketsetso.Hoo e ka bang 87% ea matla a tlhahiso ea rabara ea styrene butadiene lefatšeng e sebelisa emulsion polymerization.Ka kakaretso, rabara ea styrene butadiene e bua haholo ka rabara ea emulsion polymerized styrene butadiene.Emulsion polymerized styrene butadiene rabara e boetse e kenyelletsa mocheso o phahameng oa emulsion polymerization ea butadiene styrene le mocheso o tlase oa emulsion polymerization ea batadiene e batang.
Sebelisa
E sebelisetsoa ho etsa rabara ea seponche, fiber e kentsoeng le lesela, hape e sebelisoa e le sekhomaretsi, ho roala joalo-joalo.
Nako ea poso: Mar-10-2022