摘要
高分子粘接剂与小分子增塑剂癸二酸二辛酯(DOS)的相分离会严重影响端羟基聚丁二烯(HTPB)固体推进剂的使用性能。文中应用分子动力学(MD)和介观动力学(MesoDyn)模拟方法研究了不同增塑剂含量和温度对HTPB/DOS共混物的相容性和介观形貌的影响。结果表明,在室温时当增塑剂DOS的含量为6%时,HTPB和DOS的相容性最好;随温度升高,HTPB/DOS共混物的相容性得到改善,当温度低于228K时,共混物会产生明显的相分离。
The phase separation between polymer binder and small molecular plasticizer dioctyl sebaceae（DOS） has an important effect on the properties of hydroxyl-terminated polyethadene（HTPB） propellants.The influence of plasticizer content and temperature on the miscibility and microphase morphology of HTPB/DOS blends was investigated by atomistic molecular dynamics（MD） and mesoscopic dynamics（MesoDyn） simulations.The results indicate that at 6% concentration of DOS,the HTPB/DOS blends approximately possess a homogeneous phase at room temperature.The temperature is another key factor in controlling microphase morphology of blends,as temperature rises the compatibility of HTPB/DOS improves and when the temperature lower 228K,the phase separation happens.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2011年第5期186-190,共5页
Polymer Materials Science & Engineering
基金
国防973资助项目(61338)
山西省青年科技研究基金(2010021023-5)
太原市大学生创新创业专题项目(100115127)
关键词
端羟基聚丁二烯
癸二酸二辛酯
分子动力学
介观动力学
相互作用参数
hydroxyl-terminated polybutadiene
dioctyl sebacate
molecular dynamics
mesoscopic dynamics
interaction parameter
