多臂型端酯基聚叠氮缩水甘油醚的合成与表征

Synthesis and Characterization of Multi-Armed Ester-Terminated Glycidyl Azide Polymer

分别以丙三醇、季戊四醇为起始剂,四氯化锡为催化剂,环氧氯丙烷阳离子经开环聚合得到两种不同多臂型端羟基聚环氧氯丙烷(PECH-OH),其端羟基经酯化改性、氯甲基侧基的氯被叠氮基取代,得到两种不同多臂型GAPE。对多臂型GAPE进行傅里叶红外光谱(FT-IR)、凝胶色谱(GPC)、热失重(TG)和差示扫描量热(DSC)表征。结果表明,GAPE-3和GAPE-4的分子量分别是890和1260,玻璃化转变温度分别是-55.2℃和-53.9℃,GAPE的热分解过程为叠氮基热分解和聚醚主链热分解两个相对独立的阶段。

In order to attain multi-armed ester-terminated glycidyl azide polymer,different multi-armed hydroxy-terminated polyepichlorohydrins（PECH-OH） were synthesized by the cation opening-ring polymerization of epichlorohydrin using glyceryl alcohol and pentaerythritol as initiators.Then,multi-armed ester-terminated glycidyl azide polymers（GAPE） were obtained by the reactions of esterification and azidonation in succession.The structure and thermal property of GAPEs were characterized by Fourier transform infrared spectroscopic（FT-IR）,gel permeation in chromatography（GPC）,differential scanning calorimetry（DSC） and thermogravimetry analysis（TG）.The results show that the molecular weights of GAPE3 and GAPE-4 are 890 and 1260,respectively.The glass transition temperatures of GAPE-3 and GAPE-4 are-55.2 ℃ and-53.9 ℃,respectively.The thermal decomposition of GAPEs has two stages.The first stage is decomposition of azido and the second stage is decomposition of main chain of polyether.