| Investigation on the Structure and Curing Performances of Secondary Amine Terminated Hyperbranched Poly（ester-amine）s |
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| 作者姓名： | JIN Xin TANG Li-Ming YOU Hu |
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| 作者单位： | Laboratory of Advanced Materials,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China |
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| 基金项目： | SuppoNed by NNSFC （No8. 20204005. 50233030） |
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| 摘 要： | <正>Three secondary amine terminated hyperbranched poly(ester-amine)s(defined as HPEA1,HPEA2 and HPEA3)were synthesized from piperazine(A_2)and trimethylolpropane triacrylate(TMPTA,B_3)at their molar ratios of 2.5:1,2.25:1 and 2.0:1,respectively.The polymers were analyzed by ~1H NMR,GPC,DSC and TGA.The results indicated that the ratio of secondary amine to tertiary amine and the content of secondary amine decreased,while the molecular weight, molecular weight distribution and glass transition temperature(T_g)increased from HPEA1 to HPEA3.Due to their reactive terminal groups and flexible chains,these polymers further reacted with an epoxy resin(E51)to form cured films under ambient conditions.With increasing the ratio between secondary amine groups and epoxy groups from 1:2 to 2:1,the gel content,film hardness and onset decomposing temperature of the cured samples increased.The good film performances should make the polymers as the components of non-solvent coating materials.
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| 关 键 词： | 固化性能 二级胺 超支化 聚合物材料 玻璃化转变温度 分子量分布 结构 三羟甲基丙烷 |
Investigation on the Structure and Curing Performances of Secondary Amine Terminated Hyperbranched Poly(ester-amine)s |
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| JIN Xin,TANG,Li-Ming YOU,Hu.Investigation on the Structure and Curing Performances of Secondary Amine Terminated Hyperbranched Poly(ester-amine)s[J].Chinese Journal of Structural Chemistry,2010,29(7):1115-1121. |
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| Authors: | JIN Xin TANG Li-Ming YOU Hu |
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| Abstract: | Three secondary amine terminated hyperbranched poly(ester-amine)s (defined as HPEA1,HPEA2 and HPEA3) were synthesized from piperazine (A2) and trimethylolpropanetriaerylate (TMPTA,B3) at their molar ratios of 2.5:1,2.25:1 and 2.0∶1,respectively.The polymers were analyzed by 1H NMR,GPC,DSC and TGA.The results indicated that the ratio of secondary amine to tertiary amine and the content of secondary amine decreased,while the molecular weight,molecular weight distribution and glass transition temperature (Tg) increased from HPEA1 to HPEA3.Due to their reactive terminal groups and flexible chains,these polymers further reacted with an epoxy resin (E51) to form cured films under ambient conditions.With increasing the ratio between secondary amine groups and epoxy groups from 1∶2 to 2∶1,the gel content,film hardness and onset decomposing temperature of the cured samples increased.The good film performances should make the polymers as the components of non-solvent coating materials. |
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| Keywords: | hyperbranched poly(ester-amine) structure epoxy resin curing film |
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