Nanometer expansion and contraction dynamics of polymer films induced by nanosecond laser excitation

Hiroshi Masuhara*, T. Tada, T. Masubuchi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Intense excimer laser excitation of poly(methyl methacrylate) (PMMA) and polyimide films gives the transient expansion and the following contraction, which was directly measured as a function of nanosecond delay time during and after excitation. Depending on laser excitation condition, very rapid decay component and oscillatory behavior were observed in contraction and also phase transition is confirmed for PMMA. The behaviors are well interpreted by photothermal mechanism. In case of polyimide the expansion behavior is inconsistent with the simulation based on photothermal mechanism, on which we consider photochemical processes. New aspects of nonlinear polymer dynamics are presented and summarized.

Original languageEnglish
Title of host publicationNonlinear Dynamics in Polymeric Systems
EditorsJohn Pojman, Qui Tran-Cong-Miyata
Pages212-225
Number of pages14
DOIs
StatePublished - 1 Dec 2004

Publication series

NameACS Symposium Series
Volume869
ISSN (Print)0097-6156

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