环氧化端羟基聚丁二烯改性环氧树脂隔热涂层的研究(英文)

Research of Epoxy Resin Insulation Coating Toughening Modified with Epoxidized Hydroxyl Terminated Polybutadiene

本研究采用自制环氧值为0.19的环氧化端羟基聚丁二烯(EHTPB)改性以双酚A型环氧树脂为基体的隔热涂层材料,以提高涂层材料断裂伸长率为主要目标,研究了EHTPB与环氧树脂的质量配比,甲苯二异氰酸酯含量以及低分子量聚酰胺固化剂含量对改性体系拉伸断裂伸长率及断裂强度的影响规律,改性结果表明,隔热涂层的断裂伸长率从未改性时的0.25%提高到改性后的30.84%,超过了实际应用的需求(≥5%).同时热重分析的结果表明改性后涂层能更好地适应高温下的性能要求。

Epoxidized hydroxyl terminated polybutadiene(EHTPB)containing 0.19 eqiv/100g epoxy group is employed to modify an insulation coating material based on bisphenol A type epoxy resin in an effort to improve the breaking elongation of the coating material.The influence of several factors on the properties of final coating materials,such as weight ratio of EHTPB and epoxy resin,toluene diisocyanate(TDI)content and the content of low molecular polyamide curing agent,are discussed in this work.The results showed that the breaking elongation of insulation coating has been significantly improved from 0.25% of unmodified sample to 30.84% of modified with EHTPB.It is much higher than the breaking elongation required for application(no less than 5%).In addition,the result of thermogravimetric analysis showed that the modified coating exhibits better thermal decomposition performance than that of unmodified one.