Surface-Induced Asymmetries during Spinodal Decomposition in Off-Critical Polymer Mixtures
Surface-Induced Asymmetries during Spinodal Decomposition in Off-Critical Polymer Mixtures
复制标题
非临界聚合物混合物中旋节线分解过程中表面引起的不对称性
DOI：
10.1021/ma00101a015
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发表时间：
1994
期刊：
影响因子：
5.5
通讯作者：
A. Chakrabarti
中科院分区：
文献类型：
--
作者：
G. Krausch;E. Kramer;F. Bates;J. Marko;Gregory K. Brown;A. Chakrabarti
研究了聚乙烯丙烯（PEP）和全氘代聚乙烯丙烯（dPEP）的对称和非对称混合物在旋节线分解过程中表面润湿层的生长。对于非临界淬火，增长率被发现是强烈依赖于混合物的散装组合物。如果少数相润湿表面，则润湿层被发现比在相反的情况下生长得更慢，在相反的情况下，多数相润湿表面。在后一种情况下，流体动力学效应可能发挥作用，增加润湿层生长的速率。与临界组分相比，非临界组分的表面旋节波较浅
We have studied the growth of the wetting layer formed at the surfaces of symmetric and nonsymmetric mixtures of poly(ethylenepropylene) (PEP) and perdeuterated poly(ethylenepropylene) (dPEP) during spinodal decomposition. For off-critical quenches, the growth rat is found to be strongly dependent on the bulk composition of the mixtures. If the minority phase wets the surface, the wetting layer is found to grow slower than in the reverse situation, where the majority phase wets the surface. In the latter case, hydrodynamic effects may play a role, increasing the rat of wetting layer growth. The surface spinodal waves are shallower for the case of off-critical compositions as compared to critical compositions