引用本文:
于逢源, 肖汉文, 徐冰, 黄世强. 低密度聚乙烯的接枝改性[J]. 应用化学,
2005, 22(7): 796-799.
Citation: YU Feng-Yuan, XIAO Han-Wen, XU Bing, HUANG Shi-Qiang. Modification of LDPE by Grafting[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 796-799.
Citation: YU Feng-Yuan, XIAO Han-Wen, XU Bing, HUANG Shi-Qiang. Modification of LDPE by Grafting[J]. Chinese Journal of Applied Chemistry, 2005, 22(7): 796-799.
低密度聚乙烯的接枝改性
摘要:
采用多组分单体熔融接枝法,以甲基丙烯酸缩水甘油酯(GMA)和苯乙烯(St)作为接枝单体,对低密度聚乙烯(LDPE)进行熔融接枝改性,获得了接枝率为3%的改性低密度聚乙烯。用DSC研究LDPE接枝共聚物的非等温结晶过程,分析了接枝前后LDPE非等温行为的差异,发现LDPE-g-(St-co-GMA)结晶峰(Tc)的峰型变宽且向高温方向移动,Avrami指数n的值在4左右,说明接枝前后的聚乙烯体系成核及生长模式相似。用偏光显微镜观察了结晶的形态。
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关键词:
- 低密度聚乙烯
- / 甲基丙烯酸缩水甘油酯
- / 非等温结晶Avrami方程
English
Modification of LDPE by Grafting
Abstract:
Via the melt-grafted reaction of low density polyethylene (LDPE) with multimonomer,we successfully introduced Glycidyl methylacrylate and Styrene onto the macromolecular chain of LDPE.The grafting degree of gLDPE reached to 3% approximately.Two analytic methods were employed to study the different processes of the non-isothermal crystallization for LDPE and gLDPE.Crystal of the grafted LDPE was observed by means of a polarized optical microscope.The investigation showed that compared to that of LDPE,the crysallization temperature (Tc) of gLDPE has shifted to higher temperature slightly and the range of crystallization temperature has become wider.The exponent n of Avrami equation was about 4,indicating that gLDPE and LDPE have a similar model of non-isothermal crystallization.
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Key words:
- LDPE
- / GMA
- / non-isothermal crystallization
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