摘要
双马来酰亚胺树脂(BMI)预聚物由于黏度过大严重影响了其成型加工性,并且,其树脂固化物交联度过大导致其存在力学性能和耐湿热性能较差等缺陷,因此,需要对BMI进行改性,拓展其应用范围。采用末端含有活性氨基的硅烷偶联剂3-氨基丙基三甲氧基硅烷(KH-521)和新戊二醇(NPG)作为原料,对甲苯磺酸为催化剂,通过酯交换法制备了一种含端氨基的新型超支化聚硅氧烷(NH_(2)-HBPSi),并用其对BMI进行改性。研究了NH_(2)-HBPSi添加量对NH_(2)-HBPSi/BMI固化材料力学性能的影响,并采用非等温扫描量热法(DSC)研究了NH_(2)-HBPSi/BMI树脂体系的固化反应动力学特征,确定了其分段固化工艺,为新型BMI树脂的制备提供了思路。
Due to the high viscosity of bismaleimides(BMI)prepolymer,its machivenability was seriously affected;the excessive crosslinking structure of BMI curing materials resulting in poor mechanical properties,low heat and humidity resistance,thus it is need for the modification of the BMI.In this paper,a new hyperbranched polysiloxane(NH_(2)-HBPSi)containing terminal amino groups was prepared by transetranation method,the 3-aminopropyl trimethoxysilane(KH-521)and neopentyl glycol(NPG)were chosen as raw materials,and p-toluene sulfonic acid was chosen as catalyst.The NH_(2)-HBPSi was used to modify BMI.The influence of NH_(2)-HBPSi dosage on the mechanical properties of NH_(2)-HBPSi/BMI curing materials was studied.The kinetic characteristics of the curing reaction of NH_(2)-HBPSi/BMI resin system were studied by scanning calorimetry(DSC),and the curing process was determined.This research aims to provide a useful idea for the preparation of new BMI resin.
作者
刘振
贾园
翟云会
杜威
师瑞峰
LIU Zhen;JIA Yuan;ZHAI Yunhui;DU Wei;SHI Ruifeng(The Key Laboratory for Surface Engineering and Remanufacturing in Shaanxi Province,College of Chemical Engineering,Xi’an University,Xi'an,Shaanxi 710065,China;School of Chemistry and Chemical Engineering,Xi’an University of Science and Technology,Xi'an,Shaanxi 710054,China)
出处
《塑料》
CAS
CSCD
北大核心
2021年第1期78-83,共6页
Plastics
基金
陕西省教育厅专项科研计划(18JK1152)。
