Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Synthesis, Characterization and Haemocompatibility of Poly(styrene-b-isobutylene-b-styrene) Triblock Copolymers

폴리(스티렌-이소부틸렌-스티렌) 삼중블록 공중합체의 합성, 분석 및 혈액적합성

  • Ren, Ping (College of Material Science and Engineering, Beijing University of Chemical Technology) ;
  • Wu, Yi-Bo (Department of Material Science and Engineering, Bejjing Institute of Petrochemical Technology) ;
  • Guo, Wen-Ii (Department of Material Science and Engineering, Bejjing Institute of Petrochemical Technology) ;
  • Li, Shu-Xin (Department of Material Science and Engineering, Bejjing Institute of Petrochemical Technology) ;
  • Mao, Jing (Key Laboratory for Synthetic Resin, Petrochemical Institute) ;
  • Xiao, Fei (College of Material Science and Engineering, Beijing University of Chemical Technology) ;
  • Li, Kang (Department of Cardiology, Beijing Hospital)
  • Received : 2010.08.04
  • Accepted : 2010.10.21
  • Published : 2011.01.25
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Abstract

The synthesis of well-defined poly(styrene-b-isobutylene-b-styrene) (SIBS) triblock copolymers was accomplished by cationic sequential block copolymerization of isobutylene (IB) with styrene (St) using 1,4-di(2-chloro-2-propyl) benzene (DCC) /$TiCl_4$/2,6-di-tert-butylpyridine(DtBP) as an initiating system in methyl chloride ($CH_3Cl$)/methylcyclohexane(MeChx) (50/50 v/v) solvent mixture at $-80^{\circ}C$. The triblock copolymers exhibited excellent thermoplastic and elastomeric characteristics. Tensile strengths and Shore hardness increased with increasing polystyrene (PS) content, while elongation at break decreased. The blood-compatibility of SIBS was assessed by SEM observation of the platelet adhesion, blood clotting time and haemolysis ratio. The haemolysis ratios were below 5% which met the medical materials standard. The platelet adhesion test further indicated that SIBS block copolymers had a good blood compatibility.

Keywords

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