【摘要】 采用过氧乙酸原位法对不同分子量的端羟基聚丁二烯(HTPB)进行环氧化改性,研究了反应温度、反应时间以及反应物配比对产物环氧化端羟基聚丁二烯(EHTPB)的环氧值、羟值以及开环率的影响。结果显示随着反应物HTPB分子量的增加,EHTPB环氧值显著降低,但当分子量继续增加,其对环氧值的影响逐渐减小;发现HTPB分子量对EHTPB开环率以及合成工艺对它的影响较小,确定了不同分子量HTPB环氧化的最佳合成工艺。更多还原

【Abstract】 The epoxidized hydroxyl-terminated polybutadiene(EHTPB) with different molecular weight were prepared by peroxide acetic acid in situ.The effects on epoxide number,hydroxyl number and ring opening probability of reaction temperature,reaction time and reaction raw material ratio were studied.Experiments showed that the epoxide number of EHTPB decreased with increasing in the molecular weight of HTPB.The influence of molecular weight of HTPB on epoxide number weakened with its more increase.The effects on ring opening probability and optimum condition of molecular weight of HTPB weren’t obvious and the optimum condition was found.更多还原