接枝β寡肽制备强韧热塑性聚异戊二烯  

Preparation of Strong and Tough Thermoplastic Polyisoprene by Graftingβ-oligopeptides

作　　者：许燃 白思杰 徐云祥 XU Ran;BAI Sijie;XU Yunxiang(Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065

出　　处：《橡胶工业》2021年第11期803-808,共6页China Rubber Industry

基　　金：国家自然科学基金资助项目(51973126)。

摘　　要：通过新癸酸钕/三异丁基铝/二异丁基氯化铝稀土配位聚合,将异戊二烯(IP)单体和羟基异戊二烯衍生物(IPOH)无规共聚得到了热塑性羟基聚异戊二烯(PIP-OH),并接枝β-丙氨酸四肽(β4A),合成了热塑性β四肽聚异戊二烯(PIP-β4A)。结果表明:β4A增强和增韧了PIP-OH,PIP-β4A的拉伸强度为12.07 MPa,为PIP-OH拉伸强度的44.7倍;红外光谱、X射线衍射光谱以及原子力显微镜分析证明β4A在PIP基体中形成β-折叠片层,这是PIP-β4A性能优异的主要原因。In this study,hydroxyl functionalized thermoplastic polyisoprene(PIP-OH)was prepared by random copolymerization of isoprene(IP)and hydroxy isoprene derivatives(IP-OH)using rare earth coordination polymerization catalyst Nd(VA)3/Al(i-Bu)3/Al(i-Bu)2Cl.Thermoplasticβtetrapeptide polyisoprene(PIP-β4A)was synthesized by graftingβ-alanine tetrapeptide(β4A)into PIP-OH.The results showed thatβ4A enhanced the strength and toughness of PIP-OH.The tensile strength of PIP-β4A reached 12.07 MPa,which was 44.7 times the tensile strength of PIP-OH.In addition,Fourier transform infrared spectrum,X-ray diffraction spectrum and atomic force microscope analysis confirmed thatβ4A formedβ-folded sheets in the PIP matrix,which was the main factor for the excellent performance of PIP-β4A.

关 键 词：聚异戊二烯 寡肽 β-折叠片层 配位聚合 羟基 

分 类 号：TQ334[化学工程—橡胶工业] TQ330.1