Refractometric determination of second‐order transition temperatures in polymers. II. Some acrylic, vinyl halide, and styrene polymers
Refractometric determination of second‐order transition temperatures in polymers. II. Some acrylic, vinyl halide, and styrene polymers
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一些丙烯酸、卤乙烯和苯乙烯聚合物的二级转变温度的折光测定。
DOI：
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发表时间：
1948
期刊：
影响因子：
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通讯作者：
G. Brauer
中科院分区：
文献类型：
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作者：
R. H. Wiley;G. Brauer
用于测定聚合物二阶转变温度的折射法已经扩展到包括一系列在0°和75°C之间发生转变的聚合物。折射率数据在±30°到50°c的转变温度的一些丙烯酸酯，甲基丙烯酸酯，氯乙烯，偏氯乙烯，苯乙烯聚合物和共聚物给出。这些数据显示了这些聚合物的二阶转变温度的不连续性。在Tm附近偏离线性关系与时间效应有关。
A refractometric method for determination of second-order transition temperatures of polymers has been extended to include a series of polymers for which the transition occurs between 0° and 75°C. Refractive index data within ±30° to 50°C. of the transition temperature are given for some acrylate, methacrylate, vinyl chloride, vinylidene chloride, and styrene polymers and copolymers. These data show discontinuities which locate the second-order transition temperatures for these polymers. Deviation from the linear relation near Tm has been related to a time effect.