摘要
采用固相接枝法制备低密度聚乙烯(LDPE)接枝马来酸酐(MAH),并利用FT-IR表征了接枝产物的化学结构。研究了反应温度、引发剂用量、单体用量、界面剂用量以及反应时间对产物接枝率和交联度的影响。同时考察了接枝产物(LDPE-g-MAH)对聚酰胺66/低密度聚乙烯(PA66/LDPE)共混物的力学性能和形态的影响。结果表明,MAH已成功接枝到了LDPE上;适当提高反应温度、加大引发剂与MAH用量有利于产物接枝率的提高,但温度过高、引发剂用量过大会导致产物交联;界面剂的加入不仅能够提高接枝率,还能有效抑制产物交联;LDPE-g-MAH引入能明显提高PA66/LDPE的冲击强度与拉伸强度,有效改善共混物的相容性。
Low density polyethylene grafting maleic anhydride was prepared by solid phase, and product strcture was characterized by FT-IR. The effect of reaction temperature, initiator amount, monomer amount, interfaeial agent and reaction time on grafting degree and crosslinking degree were studied. At the same time, investigating the effect of grafting product（LDPE-g-MAH）on mechanical properties and morphology of PA66/LDPE blend. The results showed that MAH has been grafted into the LDPE. It is beneficial for grafting degree of product to properly improvereaction temperature, increased amount of intiator and MAH. Addition of interracial agent not noly can improve the grafting degree of product, but also inhibited the crosslinking effectiveiy. Introducing LDPE-g-MAH can enhance the impact strength and tensile strength of （PA66/LDPE） significantly, improved the compatiability of blend.
出处
《化工新型材料》
CAS
CSCD
北大核心
2011年第2期123-126,共4页
New Chemical Materials
关键词
聚乙烯接枝马来酸酐
接枝率
聚酰胺66
polyethylene grafted maleic anhydride, grafting degree, polyamide 66
