HTPB热固PBX老化过程中的体积收缩  

Volume Shrinkage of HTPB Thermosetting PBX in the Aging Process

作　　者：贺传兰[1] 兰林钢[1] 温茂萍[1] 庞海燕[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《火炸药学报》2014年第5期20-24,共5页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(11372292);中国工程物理研究院发展基金(2013A0203006)

摘　　要：采用加速老化试验研究了HTPB热固PBX样品在老化过程中的体积收缩情况,从后固化反应和相对交联密度变化两个方面分析了体积收缩的原因。结果表明,在老化初期,PBX体积收缩率随老化温度的升高和老化时间的延长而增大。70℃老化90d后,体积收缩率接近定值;HTPB弹性体在老化过程中的后固化反应是引起体系体积收缩的根本原因。The volume shrinkage of HTPB thermosetting PBX during the aging process was studied by accelerated aging method. The reason for volume shrinkage was analyzed from post curing reaction and relative crosslinking density. The results show that the volume shrinkage rate of PBX increases with aging temperature rising and time extending at the early aging stage, and is close to constant value after 90days aging process at 70℃. Post curing re- action of HTPB during the aging proces is the fundamental reason of volume shrinkage of PBX.

关 键 词：物理化学 HTPB 热固PBX 加速老化 体积收缩 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ560[化学工程—炸药化工]