【摘要】 研究了在空气中经紫外光辐照前后的聚（甲基环己基硅烷）（简记为：PMCS）溶液和甲基环己基硅烷甲基苯乙基硅烷共聚物（简记为：Copolymer）溶液的荧光光谱.结果表明，随着紫外光光照时间的增加，这两种聚硅烷溶液的荧光光谱峰位依次蓝移，荧光强度依次降低.并用UV光谱，GPC，XPS及IR光谱研究了在空气中经紫外光辐照前后的PMCS和Copolymer溶液.结果表明，这两种聚硅烷溶液的荧光光谱峰位蓝移及荧光强度降低，与聚硅烷发生了光降解和光氧化过程有关.更多还原

【Abstract】 The fluorescence spectra of poly(methylcyclohexylsilane) (abbrevd. PMCS) and poly(methylphenethylsilanecomethylcyclohexylsilane) (abbrevd. Copolymer) solutions in cyclohexane before and after UV irradiation in air are studied. The experimental results show that the positions of the fluorescence peaks shift to a shorter wavelength and the fluorescence intensities decrease gradually with an increase of UV exposure time. The dependences of UV spectra, GPC, XPS and IR spectra of PMCS or Copolymer solutions upon UV exposure in air indicate that these phenomena are in accordance with the processes of photodegradation and photooxidation, which lead to the decreasing of molecular weights and the formation of siloxane structure in siliconsilicon main chains.更多还原