摘要
采用反应型双螺杆挤出机和熔融接枝技术制备了一系列高密度聚乙烯（PE-HD）接枝物，采用红外光谱表征了衣康酸接枝PE-HD（PE-HD-g-ITA）和衣康酸-苯乙烯共聚物接枝PE-HD[PE-HD-g-（ITA-co-St）]的结构，并研究了接枝率（GR）和熔体流动速率与单体和引发剂用量的关系；制备了PE-HD-g-ITA增容PA6／PE-HD共混物，研究了共混物的力学性能和形态结构。结果表明：引入相容剂PE-HD-g-ITA，共混体系的冲击强度较纯PA6提高近1．7倍；共混体系两相界面变得模糊，分散相尺寸减小，说明相容剂能明显改善共混物两相界面间的黏结，改善体系的分散状况，两相问的相容性得到明显提高；相容剂对共混物两相熔点（Tg）的影响不大，PA6相结晶度稍有下降，PE-HD相结晶度却明显增加。
Itaconic acid grafted polyethylene （PE-HD-g-ITA） was prepared via melt grafting through twin screw extrusion. The grafting was confirmed using FTIR, and the effects of concentrations of monomers and initiator on the graft ratio and melt flow rate of PE-HD-g-ITA were studied. The PE- HD-g-ITA was introduced into PA6/PE-HD blends through twin screw extrusion. The impact strength of the PA6/PE-HD blends containing PE-HD-g-ITA was 1.7 times higher than neat PA6. SEM showed that the interface between PA6 and PE-HD became smeared and the dispersion phase size significantly reduced, which indicated an effective compatilization. DSC showed PE-HD-g-ITA did not affect the melt point （ Tm） of both phases, whereas the degree of crystallinity for PA6 phase decreased slightly, that for PE-HD phase increased obviously.
出处
《中国塑料》
CAS
CSCD
北大核心
2007年第4期25-30,共6页
China Plastics
关键词
聚酰胺6
高密度聚乙烯
衣康酸
共混
力学性能
形态结构
polyamide 6
high density polyethylene
itaconic acid
blending
mechanical property
morphology
