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首页> 外文期刊>Polymer: The International Journal for the Science and Technology of Polymers >Light scattering characterization of tetramethyl polycarbonate blends with polystyrene and with styrene-pentabromobenzyl acrylate copolymers
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Light scattering characterization of tetramethyl polycarbonate blends with polystyrene and with styrene-pentabromobenzyl acrylate copolymers

机译：四甲基聚碳酸酯与聚苯乙烯和苯乙烯-五溴苄基丙烯酸酯共聚物的共混物的光散射特性

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摘要

Time resolved light scattering is used to study the phase separation of tetramethyl polycarbonate (TMPC) blends with polystyrene (PS) and with styrene-pentabromobenzyl acrylate copolymers (S-PBBA). Addition of PBBA to the copolymer reduces the lower critical solution temperature with TMPC and slows the rate of phase separation. Both thermodynamic and structural contributions to phase separation are considered. TMPC/PS diffusion coeffcients estimated using the linearized Cahn-Hilliard theory are compared with light scattering measure-ments reported previously and with calculated mutual diffusion coefficients extrapolated from tracer diffusion measurements. The effect of the jump depth into the two phase region on the late stage coarsening process is shown to correlate with the duration of the early stage process of spinodal decomposition.
机译：时间分辨光散射用于研究四甲基聚碳酸酯（TMPC）与聚苯乙烯（PS）和苯乙烯-五溴苄基丙烯酸酯共聚物（S-PBBA）的相分离。在共聚物中添加PBBA可以降低TMPC的较低临界溶液温度，并减慢相分离的速度。考虑了热力学和结构对相分离的贡献。将使用线性化的Cahn-Hilliard理论估计的TMPC / PS扩散系数与先前报道的光散射测量值以及从示踪剂扩散测量值推算出的相互扩散系数进行了比较。研究表明，进入两相区域的跳变深度对后期粗化过程的影响与旋节线分解早期阶段的持续时间相关。

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