摘要
采用预聚体法合成了一系列聚氨酯 /乙烯基酯树脂复合弹性体 ,并用动态力学分析法研究了组成、异氰酸酯指数及是否计量 VER中的仲羟基等对复合弹性体的阻尼性能的影响。结果表明 ,当 PU/VER的质量比例为 60 /40 ,且异氰酸酯指数接近 1时 ,材料的阻尼性能最好 ;不计量 VER中的仲羟基时 ,所合成的 PU/VER表现为两个玻璃化转变温度。此外 ,用 VER直接作为 PU的交联剂 ,二者共聚所形成的的 PU/VER的阻尼温域可达 10 0℃以上 。
A series of polyurethane/vinyl ester resin (PU/VER) composite elastomers were prepared by precursors polymerization. The damping properties of PU/VER samples, with different composition, different isocyanate index and hydroxyl groups in VER metered or not, were studied by dynamic mechanical analysis (DMA). The results demonstrated that PU/VER composite elastomers show better damping properties at PU/VER=60/40 and isocyanate index at close range 1. When hydroxyl groups in VER were not metered, the elastomers presented two glass-transition temperatures. Furthermore, the damping temperature range of PU/VER cross-linking copolymer with better tan δ within normal temperature range was beyond 100 ℃, when VER acted as cross-linking agent of PU.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2002年第6期153-156,共4页
Polymer Materials Science & Engineering
