| 聚甲基丙烯酸甲酯/聚醋酸乙烯酯共混分相过程结构函数的标度分析和相凝聚 |
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| 引用本文： | 宋默.聚甲基丙烯酸甲酯/聚醋酸乙烯酯共混分相过程结构函数的标度分析和相凝聚[J].高分子学报,1992(5). |
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| 作者姓名： | 宋默 |
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| 作者单位： | 中国科学院广州化学研究所 广州，邮政编码:510650 |
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| 摘 要： | 高分子共混体系相分离动力学研究已取得了很大的进展。Cahn理论可很好地描述相分离初期过程,de Gennes的蛇行理论可较好地描述相分离初期大分子扩散。在相分离后期,人们已经发现动力学参量的标度行为,但实验结果不一,标度成因尚不十分清楚。本文研究了聚甲基丙烯酸甲酯(PMMA)/聚醋酸乙烯酯(PVAc)共混体系相分离后期过程。分析了结构函数的标度行为,初步讨论了相凝聚特征。
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| 关 键 词： | 共混 相分离 标度 结构函数 自相似 |
SCALING ANALYSIS OF STRUCTURE FUNCTION AND PHASE AGGREGATION OF SPINODAL DECOMPOSITION IN POLYMER BLENDS |
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| SONG Mo.SCALING ANALYSIS OF STRUCTURE FUNCTION AND PHASE AGGREGATION OF SPINODAL DECOMPOSITION IN POLYMER BLENDS[J].Acta Polymerica Sinica,1992(5). |
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| Authors: | SONG Mo |
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| Abstract: | Phase separation of quenched critical and off-critical polymer blends of poly (methyl methacrylate) and poly(vinyl acetate) was studied by using light scattering technique. The results show I(q, t) - qm-3-s(q/qm);s(X) -X2/(3 + X8) and X2/(2 + X6) for critical off-critical mixtures, respectively. In the late stage of phase separation, the self-similarity of the structure is preserved and the coarsening processes are one that the domains increase with self-similar. |
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| Keywords: | Phase separation Light scattering Scaling Mixture |
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