硅烷接枝HDPE的拉曼光谱  

Silane Grafted HDPE Studied by Raman Spectroscopy

作　　者：刘庆广[1] 王利娜[1] 徐建平[1] 龚方红[1] 

机构地区：[1]江苏工业学院材料科学与工程系,常州213016

出　　处：《应用化学》2007年第6期656-659,共4页Chinese Journal of Applied Chemistry

基　　金：江苏省高校自然科学基金资助项目(05KJB430024)

摘　　要：采用FT-IR与激光Raman光谱测试技术表征了硅烷接枝高密度聚乙烯(HDPE)的结构变化。在FT-IR中的1 170、1 110、1 090和960 cm-1处出现硅烷特征峰,峰较强,在Raman光谱中则出现在1 091cm-1附近,而且强度较弱。随着硅烷用量的增加,由FT-IR计算的吸光比(R1)由0.43增加到1.44,由激光Raman光谱计算的吸光比(R2)由0.028增加到0.099,二者变化趋势相同,均可估算硅烷的接枝率。采用Raman光谱表征了硅烷接枝HDPE的结晶结构。结果表明,随着硅烷用量的增加,晶相含量由69.8%下降到67.5%,非晶相含量由12.9%下降到5.5%,而中间相含量则由17.3%上升到27%。DSC结果表明,结晶度由71.8%下降到61.1%,熔点由134.4℃下降到131.1℃。The structure of silane grafted High Density Polyethylene （HDPE） was characterized by FT-IR and Laser Raman spectroscopy. The characteristic peaks of silane at 1 170, 1 110, 1 090 and 960 cm^-1 were rather stronger in the FT-IR spectrum, while the characteristic peak of silane at near 1 091 cm^-1 was quite weaker in the Raman spectrum. With the increase of the silane content, the ratio of peaks （R1） calculated from FT-IR and RE calculated from Raman increased respectively from 0. 43 to 1.44 and from 0. 028 to 0. 099. Both R1 and RE could be used to estimate the grafting ratio of silane and have the same concentration dependence trend. The crystallization of silane grafted HDPE was also characterized by Raman spectroscopy. With the increase of the silane content, Raman data showed that the mass fractions of the crystalline phase and the amorphous decreased respectively from 69. 8% to 67. 5% and from 12. 9% to 5.5%, while the mesophase increased from 17.3% to 27%. DSC data showed that the crystallinity of silane grafted polyethylene and the melting point decreased respectively from 71.8% to 61.1% and from 134. 4 ℃ to 131.1 ℃.

关 键 词：高密度聚乙烯 硅烷 接枝 结晶 拉曼光谱 

分 类 号：O631.1[理学—高分子化学]