端羟基PAGE-PTMEG-PAGE嵌段共聚醚的合成及表征

Synthesis and Characterization of Hydroxyl-terminated Block Copolyether of PAGE-PTMEG-PAGE

以聚四氢呋喃醚二醇(PTMEG)为引发剂,三氟化硼·乙醚络合物为催化剂,烯丙基缩水甘油醚(AGE)为单体通过阳离子开环聚合反应,制备了端羟基聚烯丙基缩水甘油醚?聚四氢呋喃?聚烯丙基缩水甘油醚(PAGE?PTMEG?PAGE)三嵌段共聚醚。并通过红外光谱、核磁共振氢谱、碳谱、凝胶渗透色谱和差示扫描量热法(DSC)对共聚醚的结构及性能进行了表征。结果表明,合成的共聚醚中PAGE/PTMEG链段比与投料比基本吻合,共聚醚的相对分子质量可控、分布较窄。共聚醚的玻璃化转变温度为-80.3℃,粘度为1.94 Pa·s,与四甲基对苯二腈氧化物(TTNO)固化之后所得的弹性体胶片室温下的拉伸强度为1.2 MPa,断裂伸长率为83%。

The triblock copolyether of hydroxyl-terminated polyallyl glycidyl ether(PAGE)/polytetrahydrofunan/PAGE(PAGE-PTMEG-PAGE)was synthesized via.the cationic ring-opening polymerization,using polytetrahydrofunan ether glycol(PTMEG)as initiator,boron-trifuoride ethylether complex(BF3·OEt2)as catalyst,allyl glycidyl ether(AGE)as monomer.The structure and properties of the copolyether were characterized by IR,1H NMR,13C NMR,GPC and DSC.Results indicate that the chain segment ratio of PTMEG and PAGE in the synthesized copolyether is basically consistent with the feed ratio,the relative molecular mass of the copolyether is controllable and the molecular mass distribution is relatively narrow.The glass transition temperature of the copolyether is-80.3℃,the viscosity is1.94 Pa·s,The tensile strength and elongation at break at room tem-perature of elastomer film obtained after curing with tetramethyl-p-phenylnitril oxide(TTNO)are 1.2 MPa and 83%,respectively.