摘要
采用机械粉碎方法解交联交联聚乙烯(XLPE),使用不同粒径交联聚乙烯回收料(RXLPE)填充交联聚乙烯,并对RXLPE/XLPE交联体系的交联过程和制品力学性能进行研究。结果表明,RXLPE与XLPE一次挤出由于RXLPE吸收部分交联剂不参与交联反应而导致凝胶含量下降,二次挤出则会减少其吸收而有较高凝胶含量,制品冲击强度较高;流变仪温度扫描结果发现回收料含量的增加和粒径的减小都会导致交联反应过程变慢,平衡后复数黏度降低;相同粒径下随着回收料含量的增加,模压制品冲击强度下降,弯曲模量有一定提高;相同RXLPE含量下,随着回收料粒径减小,模压制品冲击强度下降。
Cross-linked polyethylene （XLPE） was partially decomposed by mechanical grinding method and then recycled XLPE （RXLPE） was abtained, which was further used to fill in XLPE. The cross-linking process and product mechanical properties of RXLPE/XLPE were studied. The results showed that the extrusion of RXLPE/XLPE resulted in lower gel conten, because the RXLPE did not take part in the cross-linking reaction. The twice extrusion reduced the absorption and resulted in higher gel content. Thus the impact strength of the product was higher. The rheological results showed that both the increasing of RXLPE content and the decreasing of particle size led to slower cross- linking reaction, and the complex viscosity decreased after equilibrium. At the same particle size, the impact strength of molded products decreased and the flexural modulus increased with the increasing of RXLPE content. And at the same RXLPE content, the impact strength of molded products decreased with the decreasing of the particle size of RXLPE.
作者
岂林霞
王克俭
孙小杰
陈学连
梁文斌
Qi Linxia;Wang Kejian;Sun Xiaojie;Chen Xuelian;Liang Wenbin(Beijing University of Chemical Technology,Beijing 100029,China;National Institute of Clean and Low Carbon Energy,Beijing 102209,China)
出处
《航空科学技术》
2018年第9期74-78,共5页
Aeronautical Science & Technology
基金
航空科学基金(201535S9001)~~
关键词
交联聚乙烯
回收
凝胶含量
交联过程
冲击强度
cross-linked polyethylene
recycling
gel content
crosslinking process
impact strength
