【摘要】 以端羟基聚丁二烯/丙烯腈共聚物(HTBN)为软段,甲苯二异腈酸酯(TDI)为硬段的聚氨酯预聚体,以丙烯酸酯单体为自由基聚合单体,利用“同步互穿”工艺,制备了一系列室温固化HTBN型聚氨酯(HTBN-PU)/聚丙烯酸酯(PA)互穿网络(PU/PA-IPN)聚合物。研究表明:二月桂酸二丁基锡(T-12)用量为0.3%、过氧化苯甲酰(BPO)用量为1.0%时,PU/PA两相可形成较为理想的阻尼IPN结构。以甲基丙烯酸丁酯(BMA)为PA相的PU/PA-IPN材料阻尼性能最好,tanδ>0.3的温域高达126℃(-46~80℃),tanδ的峰值为0.85;PU/PA-IPN的频谱图表明,材料表现出较好的低频(10Hz)阻尼性能。更多还原

【Abstract】 Interpenetrating polymer networks(IPNs) of hydroxyl-terminated poly(butadiene/acrylonitrile)-based polyurethane/polyacrylate(PU/PA-IPNs) were synthesized by a simultaneous polymerization process at room temperature.The results showed that the compatibility and morphology of PU/PA-IPN with 0.3% T-12 and 1.0% BPO was the best.The damping property of IPNs containing butyl methacrylate showed the best,the temperature range of tanδ>0.3 was 126℃(-46~80℃) and the tanδ max reached 0.85.And it was obtained that the damping property of PU/PA-IPN was best at 10Hz.更多还原