Capacitive scanning dilatometry and frequency-dependent thermal expansion of polymer films
Capacitive scanning dilatometry and frequency-dependent thermal expansion of polymer films
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聚合物薄膜的电容扫描膨胀测量和频率相关热膨胀
DOI：
10.1103/physreve.61.1755
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Neher
中科院分区：
文献类型：
--
作者：
Bauer;Bohmer;Moreno;Richert;Sillescu;Neher
聚合物薄膜的温度特性附近和以上的玻璃化转变温度进行了探讨，使用电容高频检测温度斜坡以及在谐波温度循环实验。电容扫描荧光法的广泛适用性是通过对极性差异很大的大分子体系如聚苯乙烯、聚丁二烯和聚醋酸乙烯酯的研究来证明的。从温度循环实验的频率依赖的热膨胀系数的真实的和虚部确定在亚Hz政权。
The dilatometric properties of polymer films near and above their glass-transition temperatures were explored using capacitive high-frequency detection in temperature ramping as well as in harmonic temperature cycling experiments. The broad applicability of capacitive scanning dilatometry is demonstrated by the investigation of macromolecular systems of vastly different polarity such as polystyrene, polybutadiene, and polyvinylacetate. From temperature cycling experiments the real and imaginary parts of the frequency-dependent thermal-expansion coefficient are determined in the sub-Hz regime.