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High Perform. Polym. 12 (2000) 599602. Printed in the UK PII: S0954-0083(00)18477-6 Timetemperature superposition of phase separating polymer

Summary: High Perform. Polym. 12 (2000) 599­602. Printed in the UK PII: S0954-0083(00)18477-6
Time­temperature superposition of phase separating polymer
blend films
D A Winesett§, S Zhu, J Sokolov, M Rafailovich and H Ade
Department of Physics, North Carolina State University, Raleigh, NC 27695, USA
Department of Materials Science and Engineering, SUNY Stony Brook, Stony Brook,
NY 11794, USA
Received 30 October 2000
Abstract. Wehaveexaminedthestructureformationsinsymmetricblendfilmsofpolystyreneand
poly(methyl methacrylate) during phase separation and coalescence in the melt. We qualitatively
verify the principle of time­temperature superposition by observing morphology development
in which characteristic structures develop independently of annealing temperature and initial
morphology. Domain structures proceed to qualitatively similar morphologies regardless of the
initial morphology due to the intrinsic viscosity of the blend films.
1. Introduction
The study of polymer film dynamics and the morphologies formed during phase separation is a
complicated and fascinating subject that has received considerable interest in recent years, both
experimentally [1­12] and through computer simulation [13]. Elucidating and understanding
kinetic pathways of domain formation in these films yields a better understanding of fluid
dynamics as well as the engineering advantage to tune specific film characteristics, such as


Source: Ade, Harald W.- Department of Physics, North Carolina State University


Collections: Physics