Lamellar structure in a thin polymer blend film
Lamellar structure in a thin polymer blend film
复制标题
DOI：
10.1016/0032-3861(94)90223-2
复制
发表时间：
1994-05
期刊：
影响因子：
4.6
通讯作者：
M. Geoghegan;Richard A. L. Jones;R. S. Payne;P. Sakellariou;A. Clough;J. Penfold
中科院分区：
文献类型：
--
作者：
M. Geoghegan;Richard A. L. Jones;R. S. Payne;P. Sakellariou;A. Clough;J. Penfold
我们已经充分的特点是从甲苯溶液中浇铸的聚苯乙烯和聚丁二烯的混合物的薄膜的三维形态，使用核反应分析，中子反射仪和透射电子显微镜。富含聚苯乙烯的相润湿空气和基底界面，并被富含聚丁二烯的相分离;这些层非常明确，它们之间的界面是尖锐的（低至< 20埃）。在富含聚丁二烯的中心层内，横向相分离也是明显的，具有扁球形的富含聚苯乙烯的区域。在某些情况下，在聚丁二烯富集相中存在薄的聚苯乙烯富集层。我们讨论了这种不寻常的形态在三元聚合物-溶剂系统中的膜铸造的相分离的机制的表面效应方面的可能机制。
We have fully characterized the three-dimensional morphology of thin films of mixtures of polystyrene and polybutadiene cast from a toluene solution, using nuclear reaction analysis, neutron reflectometry and transmission electron microscopy. Polystyrene-rich phases wet both the air and substrate interfaces and are separated by a polybutadiene-rich phase; these layers are very well defined and the interfaces between them are sharp (down to< 20 A ̊). Within the polybutadiene-rich central layer, lateral phase separation is also evident, with polystyrene-rich domains of oblate spheroidal shape. Under certain circumstances thin polystyrene-rich layers exist within the polybutadiene-rich phase. We discuss possible mechanisms for this unusual morphology in terms of surface effects on the mechanism of phase separation in the ternary polymer-solvent system from which the films are cast.