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首页> 外文期刊>Journal of Applied Polymer Science >Fast transient fluorescence technique (FTRT) for studying dissolution of polymer glasses
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Fast transient fluorescence technique (FTRT) for studying dissolution of polymer glasses

机译：快速瞬态荧光技术（FTRT）用于研究聚合物玻璃的溶解

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The fast transient fluorescence technique (FTRT) was used for studying the swelling and dissolution of a glassy polymer formed by free-radical polymerization of methyl methacrylate (MMA). Anthracene (An) was introduced during polymerization as a fluorescence probe to monitor swelling and dissolution. Swelling and dissolution processes of disc-shaped poly(methyl methacrylate) (PMMA) glasses in a chloroform-heptane mixture were monitored by measuring the fluorescence lifetimes of An from its decay traces. A method is developed for low quenching efficiencies for measuring lifetimes, τ, of An, and it was observed that τ values decreased as the dissolution process proceeded. Desorption, D, and mutual diffusion, Dm, coefficients of An molecules were measured during dissolution of PMMA and found to be around 5.4×10-6 (cm2/s) and 2.2×10-6 (cm2/s), respectively.
机译：快速瞬态荧光技术（FTRT）用于研究由甲基丙烯酸甲酯（MMA）自由基聚合形成的玻璃状聚合物的溶胀和溶解。在聚合过程中引入蒽（An）作为荧光探针以监测溶胀和溶解。圆盘状聚甲基丙烯酸甲酯（PMMA）玻璃在氯仿-庚烷混合物中的溶胀和溶解过程通过测量An衰变迹线的荧光寿命来监测。开发了一种用于测量An的寿命τ的低淬灭效率的方法，并且观察到τ值随溶解过程的进行而降低。在PMMA溶解过程中测量An分子的解吸D和相互扩散Dm的系数，分别约为5.4×10-6（cm2 / s）和2.2×10-6（cm2 / s）。

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