Shanghai Daoqin Plastics Co., Ltd.

combined formed type 三嵌段ABA type styrene type thermoplastic property elastomer , can using/adopting mono can 团引发 三步 combined formed, can using/adopting di can 团引发 两步 combined formed, or mono can 团 两步 combined formed add reaction and other multiple methods. combined formed method using/adopting 烷基锂 as agent, 依次进行 styrene polymerization, 二烯烃 type mono polymerization, again add styrene mono 体, formed styrene -二烯烃- styrene 三嵌段 copolymer. di can 团 两步 combined formed method is in strong/high property solvent agent in lower, use 萘-锂 and 萘-钠 as is agent, 首先形 formed active property di anionic styrene 二烯烃二 poly 体, rear and styrene and 二烯烃发生 reaction. mono can 团 两步 combined formed and reaction, is use 烷基锂 as agent, make mono styrene polymerization, formed active property polystyrene (PS), it tool has 引发二烯烃 polymerization can force, add 入二烯烃 mono 体, formed AB ^-Li⁺ di copolymer, use coupling agent RX ₂, from formed ABA type polymer. in X can is Cl or Br.

星 type styrene type thermoplastic property elastomer using/adopting mono can active property di copolymer and more can 团偶联 reaction method combined formed. using/adopting 1, 3, 5-三 chlorine 代甲基苯三官 can coupling agent and di active property polymer reaction, formed 三臂 星 type copolymer; use can 团 四 chlorine silicon as coupling agent, its to 四臂嵌段 copolymer. type 推, can to and more more 臂 星 type copolymer. 当然, coupling agent can increase more, reaction speed degree versus decrease slow.

styrene type thermoplastic property elastomer is polystyrene (PS) and poly 寸二烯(or poly 异戊二烯)链段组 formed copolymer. polystyrene (PS) as is hard 段(plastics 段), poly butadiene (or poly 异戊二烯)链段 as is soft 段(橡胶段). in this type of copolymer in, versus 应于两 组 separation, has separation versus, has 各自 玻璃化 temperature degree. for polystyrene (PS) 链段 说, T_g约 is 70-80℃, poly butadiene T_g约 is -100℃, therefore, in room temperature lower polystyrene (PS) 链段互 versus combined or “ crosslinked ”, formed material crosslinked 区域, this combined 区域 直径约 is 30nm, it to strong/high agent function. this type of polystyrene (PS) hard and poly butadiene (or poly 异戊二烯) soft formed crosslinked structure, and 硫化橡胶 in crosslinked structure has versus 似之处, this is styrene thermoplastic property elastomer in normal temperature lower 显示硫化橡胶 features, high temperature lower 发生塑 property flow causes in.

USA Phillips石油 company product grade is Solprene 406, 411, 415, 416, 475, 480 and other product types is styrene and butadiene type copolymer, USA Shell Chemical company production Kraton is type structure. China chemical industry company can provide type and type types structure product types. has type and type copolymer pure material property can, filling material material property can, filling 炭黑补 strong/high system material material property can table/sheet 1.

嵌段 type 式 property can		BS	SBS	(SB)3­R	(SB)4R
pure material material property can	styrene / butadiene (S/B) 生胶门尼 viscosity (ML1+4, 100℃) melt flow index, g/10min heavy molecular weight (GPC), 万 拉仲 strong/high degree (49℃)MPa elongation, % solvent liquid viscosity (5.32%), Pa·s	40/60 9 476 6.7 1.7 <100 4×10-3	40/60 14 270 7.4 4.3 850 5×10-8	40/60 81 0.93 19.8 12.4 680 14×10-3	40/60 76 0.93 24.5 16.2 650 15×10-8
mixed combined filling material property can	生胶门尼 viscosity (ML1+4, 100℃) 拉仲 strong/high degree, MPa 25℃ 49℃