高温降解提高HDPE-g-MAH热熔胶黏结性的研究  

Study on Improving Adhesion Property of HDPE-g-MAH Hot Melt Adhesive by High-Temperature Degradation

作　　者：魏芳[1] 刘金贵[1] 陈弦[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065

出　　处：《现代塑料加工应用》2016年第1期5-7,共3页Modern Plastics Processing and Applications

基　　金：中国石油天然气集团公司资助项目<埋地钢制管聚乙烯防腐胶黏剂>

摘　　要：通过两步法制备了马来酸酐接枝高密度聚乙烯(HDPE-g-MAH)热熔胶,并通过第二步高温降解的方法来提高热熔胶的黏结性。利用红外光谱和熔体流动速率测试仪以及电子万能拉伸机分别测试了不同降解程度试样的接枝率、熔体流动速率、剥离强度。通过构建热降解分子模拟图,对黏接原理进行了详细的分析。试验表明,随着降解程度的增加,接枝率基本保持恒定,剥离强度和熔体流动速率呈现明显增加的趋势。HDPE - g - MAH hot melt adhesive was prepared through the two-step method, and the adhesion property of hot melt adhesive was improred by using high tem- perature degradation. IR, the melt-flow rate tester and electronic universal tensile test machine were used to test grafting rate, melt flow rate and peel strength of the sample with different degradation degrees, respectively. The adhesive mechanism was analyzed in detail hy building molecular sketch of thermal degradation . The experiments show that grafting rate remains the same basically, but peel strength and melt-flow rate show obvi- ous increasing trend with the increase of degradation degree.

关 键 词：高温降解 马来酸酐接枝高密度聚乙烯 热熔胶 黏结性 黏接原理 

分 类 号：TQ436.4[化学工程]