聚乙二醇-三聚氰胺甲醛和聚乙烯醇半互穿网络的构建及表征  

Construction and Characterization of Semi-Interpenetrating Polymer Network of Polyethylene Glycol-Melamine-Formaldehyde and Polyvinyl Alcohol

作　　者：李曼曼[1] 杭祖圣[2] 李勤华[1] 罗元香[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094 [2]南京工程学院材料工程学院,江苏南京210094

出　　处：《高分子材料科学与工程》2015年第1期158-163,169,共7页Polymer Materials Science & Engineering

基　　金：江苏省自然科学基金资助项目(BK20130747);苏北科技发展计划(BC2013434);江苏省大学生实践创新训练计划项目(166201130026);南京工程学院在职博士科研资助项目(ZKJ201301)

摘　　要：为提高三聚氰胺甲醛(MF)树脂制品的柔韧性,以聚乙二醇接枝三聚氰胺(M-PEG)替代部分三聚氰胺,并与甲醛、聚乙烯醇(PVA)在碱性条件下合成了聚乙二醇-三聚氰胺甲醛(PEG-MF)与PVA的半互穿聚合物网络体系(SemiIPN)。采用红外光谱、拉曼光谱、热重分析、差示扫描量热法等手段对Semi-IPN的微观结构进行了剖析,并分析了PEG、PVA等柔性链段对Semi-IPN黏度、游离甲醛含量、柔韧性等性能的影响。结果表明,PVA作为线型结构贯穿于聚乙二醇-三聚氰胺甲醛树脂交联网络体系结构中,形成了半互穿网络结构;所形成的Semi-IPN的热分解温度比MF树脂降低了60℃左右;Semi-IPN的韧性比纯MF树脂提高了800%,最高可达到19.700kJ/m2。In order to improve the flexibility of melamine formaldehyde resin products,semi interpenetrating network polymer(Semi-IPN)of polyethylene glycol-melamine formaldehyde resin(PEG-MF)and polyvinyl alcohol(PVA)was synthesisd under alkaline conditions with melamine-polyethylene glycol derivative(M-PEG)replacing part of melamine.The microstructure of Semi-IPN was analyzed through FT-IR,Raman and TG,and the effect of PEG,PVA on the viscosity,free formaldehyde content,toughness of Semi-IPN was also studied.The results show that PVA as linear chain is distributed throughout the crosslinked network architecture of polyethylene glycol-melamine formaldehyde resin to build a semi interpenetrating network structure;the thermal decomposition temperature of semi-IPN is lower than that of MF by 60 ℃;compared with MF resin,the toughness of Semi-IPN increases by 800%,and the highest toughness rises up to 19.700kJ/m2.

关 键 词：三聚氰胺甲醛 聚乙二醇 聚乙烯醇 半互穿网络 韧性 

分 类 号：TQ316[化学工程—高聚物工业]