以三羟甲基丙烷为核合成超支化聚酯及表征  

Synthesis and characterization of hyperbranched polyester using trimethylopropane as core molecule

作　　者：杨俊玲[1] 于振东 冉斌荣 杨阳[1] Yang Junling;Yu Zhendong;Ran Binrong;Yang Yang(School of Environment and Chemical Engineering,Tianjin Polytechnic University, Tianjin 30038)

机构地区：[1]天津工业大学环境与化学工程学院,天津300387

出　　处：《化工新型材料》2018年第5期188-191,共4页New Chemical Materials

摘　　要：以三羟甲基丙烷为核分子,2,2-二羟甲基丙酸为单体,采用一步法,合成了第二代超支化聚酯(HBPE)并对合成工艺进行了研究。采用傅里叶变换红外光谱(FT-IR)、核磁共振光谱(1 H-NMR)、差示扫描量热分析(DSC)、热重分析(TG)及凝胶渗透色谱(GPC)等手段对产品结构进行表征。结果表明:该超支化聚酯聚合的最适温度为145℃,最佳催化剂用量为0.5%,支化度DB_(frechet)=0.57,玻璃化转变温度为51.2℃,热分解温度在356℃以上。The second generation hyperbranched polyester（HBPE）were synthesized by one step method with trimethylopropane as core molecule,2,2-Dimethylolpropionic acid as monomer,and the synthesis technology was also studied.The product structure was characterized by FT-IR,1 H-NMR,DSC,TG and GPC etc.The results showed that the best reaction temperature was 145℃and the best content of catalyst was 0.5%,the branched degree was 0.57,the glass transition temperature was 51.2℃,and the thermal decomposition temperature was above 356℃.

关 键 词：超支化聚酯 温度 催化剂 玻璃化转变温度 热稳定性能 

分 类 号：TQ317[化学工程—高聚物工业]