聚氨酯胶粘剂用聚酯的研究  

Studies on Polyesters for Polyurethane Adhesive

作　　者：朱永群[1] 池振国[1] 许品珠 朱美珍 胡巧玲[1] 

机构地区：[1]杭州大学化学系,杭州310028

出　　处：《杭州大学学报（自然科学版）》1995年第4期391-398,共8页Journal of Hangzhou University Natural Science Edition

摘　　要：本文研究了以二元酸与二元醇在酸性催化剂存在下进行熔融缩聚反应的规律,合成了己二酸系和己二酸/芳香二酸系两个系列的聚酯二醇,考查了原料配比、催化剂种类、反应温度等工艺条件对缩聚反应和产品质量的影响;用化学分析、VPO、DSC、WAXD等手段对聚酯进行了表征;讨论了聚酯的化学组成与结构对聚酯型聚氨酯的结晶性、粘结性、耐热性的影响,从而找出了适合于聚氨酯胶粘剂用聚酯的组成结构和合成工艺.A series of polyesters were synthsized from Adipic Acid(AA) Dimethyl Terephthalate(DMT) Isophthalic Acid(IPA), Phthalic Anhydride(PA) with Ethylene Glycol(EG), Buthylenediol-1. 4(1. 4-BDO), PropanedioI-1.2(1. 2-PDO), Hexanediol-1.6(1. 6-HDO) and Diethylene Glycol(DEG) respectively by using meltopolycon-densation method in the presence of H3PO4 CH3-SO3H,SnCl2 · 2H2O as catalyst respectively. The technological conditions of the Polyesters synthesized were studied. The crystallinity and the melting point of the Polyesters were determined by means of X-Ray diffraction (WAXD), Differential Scanning Calorimetry(DSC). The relationship between structure and properties of Polyesters, especially the influence of Polyester's type on adhesion behaveior of the corresponding Polyurethanes are discussed. The experimental results show that :1)when the molar ration of Diol vs Dicarboxylic Acid are higher than 1. 25, the product obtained isoptimum for PU adhesive. 2)the catalysts not only affect the rate of the reactions of esterification, but also affect the color ofthe Polyesters obtained. 3)the crystallinity of Polyesters is different from each other, with the order of PHA>PHA>PEA,which is the same as that of the adhesion strength of the corresponding Polyurethanes. 4) Introducing the Aromatic cyclo in the Polyesters maybe increases the heat-resistance of Polyesters, but may not increases the adhesive strength of the corresponding Polyurethanes.

关 键 词：聚酯 缩聚反应 聚氨酯胶粘剂 结构 性能 

分 类 号：TQ433.432[化学工程]