通过有核一步法,合成了端羧基超支化聚酯(CHP),然后与环氧氯丙烷经环氧化反应制备了端环氧基超支化聚酯(EHP),并制备了EHP改性环氧树脂(EP)体系。利用傅立叶变换红外光谱法、核磁共振氢谱法、凝胶渗透色谱法、差示扫描量热法、热变形温...通过有核一步法,合成了端羧基超支化聚酯(CHP),然后与环氧氯丙烷经环氧化反应制备了端环氧基超支化聚酯(EHP),并制备了EHP改性环氧树脂(EP)体系。利用傅立叶变换红外光谱法、核磁共振氢谱法、凝胶渗透色谱法、差示扫描量热法、热变形温度分析、热失重分析、扫描电子显微镜等对EHP结构、改性EP体系固化工艺、力学性能、热性能等进行了研究。结果表明,合成了预期结构的EHP,数均分子量为1 908 g/mol,黏度为1 522.5 m Pa·s;当EHP含量为15 g时,改性EP体系的性能最佳,其冲击强度和弯曲强度分别为50.4 k J/m2,201.0 MPa,较改性前分别提高了213%,37%;热变形温度为147.5℃,热失重10%时的温度为360℃,较改性前分别下降了9%,7.7%。展开更多
A partial conjugated hyperbranched light-emitting polymer was obtained by copolymerization of a fluorescent A2 monomer and a non-conjugated B4 monomer.The polymer displays a good thermal stability compared with its li...A partial conjugated hyperbranched light-emitting polymer was obtained by copolymerization of a fluorescent A2 monomer and a non-conjugated B4 monomer.The polymer displays a good thermal stability compared with its linear counterparts,and a good solubility,controllable luminescent properties compared with full-conjugated light-emitting polymers.展开更多
文摘通过有核一步法,合成了端羧基超支化聚酯(CHP),然后与环氧氯丙烷经环氧化反应制备了端环氧基超支化聚酯(EHP),并制备了EHP改性环氧树脂(EP)体系。利用傅立叶变换红外光谱法、核磁共振氢谱法、凝胶渗透色谱法、差示扫描量热法、热变形温度分析、热失重分析、扫描电子显微镜等对EHP结构、改性EP体系固化工艺、力学性能、热性能等进行了研究。结果表明,合成了预期结构的EHP,数均分子量为1 908 g/mol,黏度为1 522.5 m Pa·s;当EHP含量为15 g时,改性EP体系的性能最佳,其冲击强度和弯曲强度分别为50.4 k J/m2,201.0 MPa,较改性前分别提高了213%,37%;热变形温度为147.5℃,热失重10%时的温度为360℃,较改性前分别下降了9%,7.7%。
文摘A partial conjugated hyperbranched light-emitting polymer was obtained by copolymerization of a fluorescent A2 monomer and a non-conjugated B4 monomer.The polymer displays a good thermal stability compared with its linear counterparts,and a good solubility,controllable luminescent properties compared with full-conjugated light-emitting polymers.
