摘要
硬脂酸改性超支化聚酯与端羟基聚丁二烯型聚氨酯(HTPB-PU)形成的互穿网络聚合物的最大拉伸强度和延伸率,均比HTPB-PU提高3倍以上,互穿网络聚合物的初始黏度低于HTPB-PU的黏度,从3 553.47 mPa.s降至1 992.45 mPa.s以下。在反应5 h内,每隔10 min测试一次该互穿网络聚合物和HTPB-PU反应体系的黏度,考察其随反应时间的变化规律后发现,前者黏度的上升速率大于后者。但是由于互穿网络聚合物的初始黏度较低,反应100 min后才接近HTPB-PU反应体系的黏度,因此不会影响所形成的互穿网络聚合物的加工工艺性能。
The tensile strength and elongation of stearic acid modified hyperbranched polyester/HTPB polyurethane elastomer IPN are 3 times higher than the pure HTPB polyurethane elastomer.At the same time,the viscosity of IPN lower than HTPB-PU,it reduced from 3 553.47 mPa·s to 1 992.45 mPa·s.In 5 h,by continuous monitoring,the viscosity of the two systems was measured in every 10 min.We found only after 100 min the IPN viscosity could be close to or exceed the control system.This is because that the initial viscosities of IPN system is lower than its corresponding control sample, so the catalyzing effect will not affect the processability of IPN.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2009年第10期1028-1031,共4页
Fine Chemicals
基金
火炸药行业青年基金项目(42001060202)~~
关键词
互穿网络聚合物
粘合剂
复合固体推进剂
黏度
工艺性能
interpenetrating polymer network
adhesives
composite solid propellant
viscosity
process performance
