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采用二步法 ,以部分交联的聚氨酯 ( PU)为聚合物 ,双酚 A型苯并嗪 ( BA)为聚合物 合成聚氨酯 /苯并嗪互穿聚合物网络 ( PU/BA IPN) ,并应用动态机械热力学分析对产物的阻尼性能进行了研究 .结果表明 ,PU/BA IPN在 PU∶ BA为 1 .5∶ 1时具有最佳的宽温域的阻尼性能 .低的 PU交联度有利于阻尼性能 ;适当地延长固化时间可提高体系的阻尼值 ,但是会使阻尼温度范围变窄
Polyurethane / benzophenazine polyether (PU / BA IPN) polymer was synthesized by a two-step method with partially crosslinked polyurethane (PU) as polymer and bisphenol A benzoxazine (BA) as polymer. , And the dynamic mechanical thermodynamic analysis of the product damping properties were studied.The results show that PU / BA IPN has the best wide temperature range of damping properties when PU: BA is 1.5: 1. Low PU cross-linking Degrees favor damping performance; proper extension of the cure time increases the damping of the system, but narrows the damping temperature range