红外光声光谱法研究本体聚合聚丙烯的紫外光氧化  

FOURIER INFRARED PHOTOACOUSTIC SPECTROSCOPIC ANALYSIS OF POLYPROPYLENE U.V. PHOTOOXIDATION

作　　者：李小俊[1] 胡克良[1] 黄允兰[1] 陈如铁[1] 周贵恩[1] 

机构地区：[1]中国科学技术大学理化科学中心,安徽合肥230026

出　　处：《高分子材料科学与工程》2001年第5期74-77,共4页Polymer Materials Science & Engineering

摘　　要：用傅立叶变换红外光声光谱 (FT- IR- PAS)方法研究了本体聚合聚丙烯粉末的紫外光氧化。结果表明 ,光氧化主要发生在样品表面 ,生成过氧化物、酮、酸、酯等氧化产物。氧化程度随光照时间的增加而不断深入和加强。同时发现和解释了光氧化中聚丙烯的结晶度的变化。Fourier infrared photoacoustic spectrum (FT-IR-PAS) was used for the studies of UV photooxidation in polypropylene. The attribution of oxidation products and changes of crystallinity during exposure were studied. It was found that the dominant oxidation products were ketone, carboxylicacid and ester. Spectra at different depths indicated that the fractional crystallinity decreased from surface to subsurface due to scission of molecules in the crystal. Crystallinity increased in bulk because of chemi-crystallization.

关 键 词：红外光声光谱法 聚丙烯 紫外光氧化 化学结晶 本体聚合 

分 类 号：O632.12[理学—高分子化学] O657.33[理学—化学]