摘要
以液态聚硫橡胶、异氟尔酮二异氰酸酯和扩链剂 3,6 -二甲硫基 - 2 ,5 -二甲苯胺为原料 ,合成了不同硬段质量分数的聚硫硫代聚脲。IR ,DMTA ,DSC和应力 -应变分析表明 ,各试样的软硬段中存在着相分离 ;硬段质量分数减少或是液态聚硫橡胶相对分子质量增加时 。
A series of polysulfide based thio-polyurea was synthesized, which were based on isophorone diisocyanate, liquid polysulfide and 2,5-diamino -3,6-dimethylmercapto toluene. The structure and mechanical properties of these elastomers were investigated using IR, DMTA, DSC and stress-strain analysis. The results showed that there was phase segregation between soft and hard segments in polysulfide based thio-polyurea. With the increase in Mn¯ and content of liquid polysulfide, the tensile strength decreased while the ultimate elongation increased.
出处
《合成橡胶工业》
EI
CAS
CSCD
北大核心
2003年第6期355-357,共3页
China Synthetic Rubber Industry
关键词
聚硫橡胶
聚硫硫代聚脲
相结构
力学性能
Elastomers
Mechanical properties
Polyurethanes
Rubber
Structure (composition)
Tensile strength
