【摘要】 基于动态力学分析法,对汽车风窗玻璃的中间膜——聚乙烯醇缩丁醛(PVB)薄膜材料的动态黏弹性参数进行了测试。系统研究了频率、温度、生产工艺和薄膜厚度对材料黏弹性的影响。结果表明,随着频率的升高和温度的降低,PVB薄膜逐渐从高弹态向玻璃态转变;且随着频率的升高,PVB薄膜玻璃化温度基本上呈线性关系增高。另外,生产工艺和试件厚度对PVB薄膜黏弹性都有一定的影响。最后拟合得到该材料WLF方程的系数。更多还原

【Abstract】 The dynamic viscoelasticity parameters of Polyvinyl Butyral(PVB) film,the interlayer material of automotive windshield) are measured based on dynamic mechanical analysis(DMA) method,and the effects of frequency,temperature,production process and thickness of PVB film on its viscoelasticity are systematically investigated.The results show that as frequency increases and temperature falls,the PVB film will gradually change from high-elastic state to glassy state,and with the rise in frequency the glass transition temperature of PVB film will increase basically linearly.The production process and thickness of PVB film also have certain influence on its viscoelasticity.Finally the constants of Williams-Landel-Ferry equation for PVB film are obtained by curve-fitting.更多还原