湿热老化对热熔胶粘剂结构稳定性的影响  

Influence of hygrothermal ageing on structural stability of hot-melt adhesives

作　　者：赵吉诗[1] 冯少广[1] 王舰[2] 李睿[1] 李荣光[1] 刘萌萌[1] 林伟[3] 杜中杰[3] 

机构地区：[1]中国石油管道科技研究中心.油气管道输送安全国家工程实验室,河北廊坊065000 [2]中国石油管道公司,河北廊坊065000 [3]北京化工大学,北京100029

出　　处：《油气储运》2013年第2期181-184,共4页Oil & Gas Storage and Transportation

摘　　要：热收缩带由辐射交联聚乙烯层、热熔胶粘剂及配套液态环氧底漆组成,其是3PE管道应用最广泛的补口材料。在热收缩带的补口过程中,主管道PE层及焊缝两侧的环氧底漆层通过热熔胶粘剂作用与热收缩带形成有效粘结,热熔胶粘剂的结构稳定性将对热收缩带补口的长期有效性产生重要影响。为此,采用红外光谱(FT-IR)、凝胶渗透色谱(GPC)等分析方法研究了湿热老化对国内外5种具有代表性的补口热收缩带热熔胶粘剂化学结构稳定性的影响,结果表明:湿热老化导致热熔胶粘剂组分发生了明显的结构变化,一方面存在部分酯基水解和小分子脱除,另一方面部分组分存在降解/交联反应。(表2,图3,参8)The heat shrinkable sleeves composed of radiation cross-linked polyethylene layer, hot-melt adhesives and matching liquid epoxy primer is most widely used in the joint coating material in 3PE pipeline. During the joint coating process of heat shrinkable sleeves, PE layer of the main pipe and the epoxy primer on both sides of the weld seam form effective bonding with heat shrink sleeves through the action of hot-melt adhesives, and the structural stability of hot-melt adhesives will have a major impact on the long-term effectiveness of heat shrinkable sleeves joint coating. For this purpose, the impact of hygrothermal ageing on chemical structure stability of hot-melt adhesive is studied for 5 typical joint coating heat shrinkable sleeves at home and abroad with infrared spectroscopy （FT-IR） and gel permeation chromatography （GPC） method, etc. The results show that hygrothermal ageing cause significant structural changes in components of hot melt adhesive, that is, there exists partial hydrolysis of ester groups and small molecules removal and there exists degradation/ cross-linking reaction in some components. （2 Tables, 3 Figures, 8 References）

关 键 词：3PE 热收缩带补口 湿热老化 热熔胶粘剂 化学结构 稳定性 

分 类 号：TE988[石油与天然气工程—石油机械设备]