摘要
本論文分為兩部分：第一部分探討經紫外光照射之對排聚苯乙烯於不同溫度過程中的色心演變行為。我們將其在353奈米波長的吸收度視與色心濃度成正比，並以一階動力學進行擬合分析，所得之反應速率符合阿瑞尼士公式，且反應活化能隨照射劑量增加而增加。此外亦與經珈瑪射線照射之對排聚苯乙烯中的色心現象進行比較。第二部分探討經紫外光照射的奈米壓印用光組薄膜表面的劈裂引發週期圖形。其空間週期對膜厚存在線性關係，而斜率隨劑量增加而下降。此外，由其表觀表面應力之分析，表面週期圖形誘發自壓應力，且與表面能無關。

Abstract
The evolution of transmittance in UV-irradiated glassy sPS at elevated temperatures was investigated. The transmission loss in UV-irradiated sPS during annealing was attributed to the generation of permanent color center. The absorbance at the wavelength of 353 nm was assumed to be proportional to the concentration of color center. A first order generation model in good agreement with the experimental data was proposed. The rate constant satisfies the Arrhenius equation, with the activation energy of color center increasing with the increase of the UV dose. A comparison of color center in UV- and gamma-irradiated sPS was discussed.
Utilizing peeling-induced splitting approach, surface ripples were produced on poly (methyl methacrylate) (PMMA)-based thermoplastic polymeric thin films. The spatial wavelength of the surface structures is a linear function of the film thickness. The apparent surface residual traction and force were found to be the thickness dependence of the spatial frequency, and both the magnitudes of the apparent surface stress and force increased with the increase of the film thickness. After exposing the PMMA-based films to UV-irradiation, the effects of UV-irradiation dose were investigated on the splitting-induced surface structures. The differential ratio of the spatial wavelength to the film thickness for the UV-irradiated films is smaller than that for non-irradiated samples. Both the spatial wavelength and the apparent surface stress increased with the film thickness for the irradiated polymer films.

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