Time- and space-resolved fluorescence study on interfacial mobility of polymers
Time- and space-resolved fluorescence study on interfacial mobility of polymers
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DOI：
10.1063/1.2335593
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发表时间：
2006-08
影响因子：
4
通讯作者：
Keiji Tanaka;Yu Tsuchimura;K. Akabori;Fuyuki Ito;T. Nagamura
中科院分区：
文献类型：
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作者：
Keiji Tanaka;Yu Tsuchimura;K. Akabori;Fuyuki Ito;T. Nagamura
采用隐失波激发荧光寿命测量方法，对一种典型的无定形聚合物聚苯乙烯在固体基质界面处的链段迁移率进行了非侵入性研究。玻璃化转变温度（Tg）在界面处明显高于体相。在不同入射角的激发脉冲的测量结果表明，Tg变得更高的接近界面。这是对界面处聚合物的Tg梯度的观察。
Segmental mobility of a typical amorphous polymer, polystyrene, at the interface with a solid substrate was examined noninvasively by fluorescence lifetime measurement using evanescent wave excitation. Glass transition temperature (Tg) was discernibly higher at the interface than in the bulk. Measurements at different incident angles of excitation pulses revealed that Tg became higher the closer to the interface. This is the observation for a Tg gradient of polymers at the interface.