新型改性聚酯的制备及性能研究  

Preparation and Barrier Properties of a New Modified Polyester

作　　者：顾晓华[1] 周士静 张希伟[1] 曾鹏[1] 宋雪[1] 程伟东[1] 

机构地区：[1]齐齐哈尔大学材料科学与工程学院,黑龙江齐齐哈尔161006

出　　处：《塑料工业》2015年第11期31-34,共4页China Plastics Industry

基　　金：黑龙江省自然科学基金(E201259)

摘　　要：首先利用丁二酸酐和4,4'-二氨基二苯基甲烷(MDA)合成一种含酰胺键二元羧酸(简称为第三单体),并将少量该单体与乙二醇(EG)、精对苯二甲酸(PTA)进行缩合共聚,制备出新型共聚酯。通过核磁共振氢谱、傅里叶红外光谱、热重分析、差示扫描量热分析、熔体质量流动速率测试、压差法阻隔测试等手段对单体和共聚酯进行了性能测试和分析。结果表明,当第三单体摩尔分数为0.5%时,与聚对苯二甲酸乙二醇酯相比,新型改性聚酯的玻璃化转变温度大约提高了5℃,熔点变化不大,其气体阻隔性能提高了近3倍,说明第三单体的引入有效地改善了聚酯的气体阻隔性能。Succinic anhydride and 4, 4-diamino diphenyl methane （MDA） were used to synthesize a kind of binary carboxylic acid containing amide bond （named the third monomer） firstly. And then a new copolyester was produced by the condensation-copolymerization of a small amount of the third monomer, ethylene glycol （EG） and purified terephthalic acid （PTA）. Various means were adopted to test the properties and analyse the monomer and the new copolyesters, including nuclear magnetic resonance, infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry analysis, melt flow rate testing and differential pressure blocking test. The results show that when the mole fraction of the added third monomer is 0. 5%, the glass transition temperature of the new modified copolyester raises about 5 ℃, melting point changes little and the gas barrier properties increases 1.5 times compared with pure PET. These results indicate that the introduction of the third monomer effectively improves the gas barrier properties of polyester.

关 键 词：丁二酸酐 4  4'-二氨基二苯基甲烷 乙二醇 精对苯二甲酸 聚对苯二甲酸乙二醇酯 新型共聚酯 阻隔性能 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]