RUPTURING OF POLYMER FILMS WITH RUBBING-INDUCED SURFACE DEFECTS*

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RUPTURING OF POLYMER FILMS WITH RUBBING-INDUCED SURFACE DEFECTS*

Papers | Updated：2021-06-21

- RUPTURING OF POLYMER FILMS WITH RUBBING-INDUCED SURFACE DEFECTS*
- Vol. 21, Issue 2, Pages: 123-127(2003)
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- Published：20 April 2003
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RUPTURING OF POLYMER FILMS WITH RUBBING-INDUCED SURFACE DEFECTS*[J]. 2003, 21(2): 123-127.
DOI：

RUPTURING OF POLYMER FILMS WITH RUBBING-INDUCED SURFACE DEFECTS*[J]. 2003, 21(2): 123-127. DOI：

摘要

It has been a long-standing question whether dewetting of polymer film from non-wettable substrate surfaceswherein the bicontinuous morphology never forms in the dewetting film is due to spinodal instability or heterogeneousnucleation. In this experiment

we use a simple method to make the distinction through introduction of topographical defectsof the films by rubbing the sample surface with a rayon cloth. Spinodal dewetting is identified for those films that dewet by acharateristic wavevector

independent of the density of rubbing-induced defects.Heterogeneous nucleation

on the other hand

is identified for those with q* increasing with increasing density of defects.Our result shows that PS films on oxide coated silicon with thickness less than ≈13 nm are dominated by spinodal dewetting

but the thicker films are dominated by nucleation dewetting.We also confirm that spinodal dewetting does not necessarily lead to a bicontinuous morphology in the dewetting film

contrary to the classic theory of Cahn.

Abstract

independent of the density of rubbing-induced defects.Heterogeneous nucleation

on the other hand

but the thicker films are dominated by nucleation dewetting.We also confirm that spinodal dewetting does not necessarily lead to a bicontinuous morphology in the dewetting film

contrary to the classic theory of Cahn.

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