摘要
室温催化合成了一系列不同结构的聚氨酯弹性体 ,研究了软硬链段的化学结构对聚氨酯弹性体形态结构和力学性能的影响规律 ,结果表明 ,由MDI合成的PU弹性体的力学性能和阻尼性能优于相应的由TDI合成的PU弹性体 ,对称结构的MDI易规整排列 ,提高了力学强度 。
A serials of polyurethane (PU) elastomers with 4,4′-methylene diphenyl diisocynat(MDI), tolyene-2,4-diisocyanate(TDI) as hard segments and poly(tetramethylene glycol) (PTMG) with different molecular weight as soft segments were synthesized by catalyst at room temperature, and the chemical structures of soft segments and hard segments that affected the mechanical properties were also studied. The result demonstrated that the mechanical performance and damping properties of MDI-PU elastomers were superior to that of TDI-PU, because of MDI has symmetrical structure and arranged regularly that enhanced the compatibility and interaction between hard segments and soft segments, and improved the mechanical damping performance.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2003年第2期211-214,共4页
Journal of Materials Science and Engineering
基金
中国工程物理研究院科学基金资助项目(990 563)
