Journal of Photoscience

Korean Society of Photoscience (한국광과학회)
권호 표지

Photoprimary Processes and Nanometer-Nanosecond Morphological Dynamics of Polymer Films Studied by Pump and Probe Measurement

  • Published : 1999.05.01
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Abstract

Intense excimer laser irradiation of polymer films results in expansion and the following contraction , recovering ithe initial flat surface. The morphological dynamics is meausred directly by nanosecond time-resolved interferometry for polystyrene(PS), polyurethane, and polyimide films. The expansion proceeds with a speed of a few nm/ns , while the contraction depends upon the polymer ; very low contraction for PS, rapid 2 component shrinking for polyurethane, and rapid monotonous decay for polymide. These characteristic behavior are considered from viewpoints of interpenetrating structures of polymers, glass-rubber phase transitioni, thermal diffusion, and photothermal mechanism.

Keywords

References

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