高耐温性钢塑管材用热熔胶黏剂的制备及性能研究

Preparation and Properties of Hot Melt Adhesive with High Temperature Resistance for Steel-plastic Composite Pipe

以神华均聚聚丙烯(PP)为基体树脂,通过与聚烯烃弹性体(POE)共混反应挤出制备了高耐温性钢塑管材用热熔胶黏剂。研究了引发剂含量、接枝单体含量和PP/POE配比对热熔胶性能的影响,考察了自制热熔胶在实际应用中的耐温性能。结果表明,反应挤出制备的聚丙烯接枝马来酸酐(PP-g-MAH)基热熔胶综合性能优异,其剥离强度和100%拉伸弹性回复率分别可达131.4 N/25 mm和65.5%;高低温循环(-40~130℃)800次后自制热熔胶的剥离强度依然可以维持在122.2 N/25 mm,剥离失效率只有7.0%,其耐温性明显优于选取的两个商业化牌号热熔胶。

The hot melt adhesive with a high temperature resistance for steel-plastic composite pipe were prepared by reactive extrusion of PP melt-grafted with maleic anhydride. The effects of initiator,grafted monomer and elastomer concentration on the hot melt adhesive were investigated. The result indicated that the comprehensive performance of the resultant hot melt adhesive was excellent,and its peel strength and tensile elastic recovery rate reached 131. 4 N/25 mm and65. 5 % respectively. According to the results obtained from the T-cycling resistance test in the temperature range of-40~130 °C,the peel strength of 122. 2 N/25 mm could still maintained after 800 times of circulation,and the loss ratio of peel strength rate was kept at just 7. 0 %,which was evidently lower than the other two commercial hot melt adhesive.