一代端羧基超支化聚合物的制备与表征

Preparation and Characterization of One Generation of Carboxyl-terminated Hyperbranched Polymer

摘要:

首先采用二乙醇胺(DEA)与丙烯酸甲酯(MA)反应得到AB2型单体N,N-二羟乙基-3-胺基丙酸甲酯，然后以三羟甲基丙烷为核，在对甲苯磺酸的催化下，与N,N-二羟乙基-3-胺基丙酸甲酯反应得到端羟基超支化聚合物（HPAE-OH），最后采用顺丁烯二酸酐对端羟基超支化聚合物进行端基改性，制得端羧基超支化聚合物（HPAE-C）。优化了一代端羧基超支化聚合物的合成条件：催化剂用量为0.7%，反应投料比n(OH) ∶n(马来酸酐)=1∶1.1，反应时间为4h，反应温度为80℃。采用 IR、1H-NMR和13C-NMR仪器分析法对端羧基超支化聚合物的分子结构进行了表征，采用表面张力仪研究了聚合物的表面活性。

Abstract:

A series of hyperbranched poly(amine-ester) with terminal alcohol group(HPAE-OH) were synthesized by the polycondensation of N,N-diethylol-3-amine-methylpropionate [prepared by the Michael addition reaction of methyl acrylate(MA) with diethanolamine(DEA)] as an AB2-type monomer with trimethylol propane(TMP) as the core moiety, proceeding in one-step procedure in the melt with p-toluenesulfonic acid(p-TSA) as catalyst. Then, it was modified by maleic anhydride to obtain hyperbranched polymer with terminal carboxyl group (HPAE-C). The appropriate reaction conditions were optimized: catalyst do sage 0.7%, molar freed ratio n(OH) ∶n(maleic anhydride) =1∶1.1, reaction time 4h and temperature 80℃. The obtained polymers were characterized by IR、1H-NMR and 13C-NMR, the surface activity of polymer was investigated by Surface Tension.