Hole formation and growth in freely standing polystyrene films

作     者：K. Dalnoki-Veress B.G. Nickel C. Roth J.R. Dutcher 

作者机构：[]Department of Physics and the Guelph-Waterloo Program for Graduate Work in Physics University of Guelph Guelph Ontario Canada N1G 2W1 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：1999年第59卷第2期

页      面：2153-2153页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

摘      要：Using optical microscopy, we have measured the formation and growth of holes in freely standing polystyrene films in the melt state. For all films, we observed exponential growth of the hole radius and uniform thickening. Our measurements are interpreted in terms of the dependence of the viscosity on the shear strain rate associated with the hole growth process. The measurement of hole growth in thin freely standing polymer films provides a unique probe of nonlinear viscoelastic effects in confined polymers.