ʻO ka lāʻau Styrene-butadiene (SBR)

ʻO Styrene-butadiene rubber (SBR) ka mea hoʻohana nui loa i ka synthetic rubber a hiki ke hana ʻia e ka copolymerization o ka butadiene (75%) a me ka styrene (25%) me ka hoʻohana ʻana i nā mea hoʻomaka radical manuahi.Loaʻa ka copolymer random.ʻO ka microstructure o ka polymer he 60% -68% trans, 14% -19% cis, a me 17% -21% 1,2-.Hoʻohana mau ʻia nā ʻano pulu no ke ʻano o nā polybutadiene polymers a me nā copolymers.Hāʻawi ka Solid-state NMR i kahi ala maʻalahi e hoʻoholo ai i ka microstructure polymer.

I kēia manawa, hoʻonui ʻia ka SBR e ka copolymerizing i nā monomers ʻelua me ka anionic a i ʻole coordination catalysts.ʻOi aku ka maikaʻi o nā waiwai mechanical o ka copolymer i hana ʻia a me ka hāʻawi ʻana i ke kaumaha molecular haiki.Hiki ke hana ʻia kahi copolymer maʻamau me ke kaʻina kauoha i ka hoʻonā me ka butyl-lithium, inā e hoʻouka mālie ʻia nā monomer ʻelua.Hiki ke hana ʻia nā copolymers poloka o ka butadiene a me ka styrene ma ka hoʻohana ʻana i ka coordination a i ʻole nā ​​mea hoʻoheheʻe anionic.ʻO Butadiene polymerize mua a hiki i ka pau ʻana, a laila hoʻomaka ka styrene e polymerize.ʻO ka SBR i hana ʻia e nā catalysts coordination i ʻoi aku ka ikaika tensile ma mua o ka mea i hana ʻia e nā mea hoʻomaka radical manuahi.

ʻO ka hoʻohana nui ʻana o SBR no ka hana ʻana i nā kaila.ʻO nā mea hoʻohana ʻē aʻe e pili ana i nā kāmaʻa, nā uhi, ke kākoʻo kāpeti, a me nā mea hoʻopili.

Hiʻona

ʻOi aku ka maikaʻi o ka pale ʻana i ka ʻaʻahu, ka pale ʻana i ka wā kahiko, ka pale wai a me ka paʻa o ka ea ma mua o ka lāʻau kūlohelohe, ʻoiai ʻoi aku ka haʻahaʻa o ka adhesion, elasticity a me ka deformation calorific waiwai ma mua o ka lāʻau maoli.Loaʻa nā waiwai piha maikaʻi loa o Styrene butadiene rubber.ʻO ia ka ʻano nui loa o ka lāʻau synthetic, a ʻo kāna huahana he 60% o ka lāʻau synthetic.Ma kahi o 87% o ka styrene butadiene rubber production capacity ma ka honua e hoʻohana i ka polymerization emulsion.ʻO ka mea maʻamau, pili ka styrene butadiene rubber i ka emulsion polymerized styrene butadiene rubber.ʻO ka emulsion polymerized styrene butadiene rubber pū kekahi me ka wela kiʻekiʻe emulsion polymerization o ka butadiene styrene a me ka wela haʻahaʻa emulsion polymerization o ka butadiene anuanu.

Hoʻohana

Hoʻohana ʻia no ka hana ʻana i ka lāʻau sponge, fiber impregnated a me ka lole, hoʻohana pū ʻia e like me ka adhesive, coating etc.