Effect of Hyperbranched Polyester on Modification of Epoxy Resins Cured with Anhydride

作     者：Xiu Xia WANG Zhi Gang JIANG Yi Feng ZHANG 

作者机构：Depaxtment of Polymer Science and Engineering Zhejiang University Hangzhou 310027 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2006年第17卷第1期

页      面：125-128页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

主　　题：Hyperbranched polyester epoxy resins modification toughness. 

摘      要：The synthesis and characterization of hyperbranched polyester （HBP） with different molecular weight are studied. The effect of HBP on the modification of epoxy resins cured with anhydride is mainly discussed. The characteristics of HBP and the morphologies of cured system are determined by nuclear magnetic resonance spectroscopy （NMR）, gel permeation chromatography （GPC） and scanning electron microscope （SEM）. The impact strength of cured system is detected and Fourier transform infrared （FTIR） measurements were used to pursue the curing process. The investigation shows that HBP can improve the toughness by forming copolymer networks between epoxy resins, HBP and anhydride. Moreover, when the molecular weight of HBP is 1342g/mol the toughening effect is the best, and the changes of toughness are small with the increase of molecular weight of HBP to 3500 g/mol.