过氧化物交联聚乙烯热收缩管成型研究

简要介绍了聚乙烯高能辐射交联、硅烷化学交联和过氧化物化学交联,给出了交联前后分子结构变化的示意图,说明3种交联方法所得到的交联聚乙烯分子结构十分接近,在性能上基本没有差别。采用最新的过氧化物交联配方,并给出详细的生产工艺,使用最新研制的具有自主知识产权的活塞式挤出机加工成型交联聚乙烯热收缩管坯,并用自制的扩管装置扩张成型热收缩管。针对试验结果,对产品的凝胶率、力学物理性能和电性能进行了讨论,并比较了辐射交联、硅烷交联和过氧化物交联3种交联生产工艺在设备投资成本、产品质量控制、能耗、交联反应时间、产品的实际交联度和产品的表面质量等方面的优劣。

Processing of Peroxide Crosslinked Polyethylene Heat-shrinkable Tubes

The radiation crosslinked PE,vinyl silane crosslinked PE and peroxide crosslinked PE are briefly introduced.The sketches were shown for the changes of molecular constitution after the crosslinking of PE.The molecular constitutions and functions of the three crosslinked PE were almost the same.The latest peroxide crosslinking formulation and particular processing technology were used for processing crosslinked PE heat-shrinkable tubes with ram extruder of our own intellectual property rights,and a self-made expanding equipment was made to expand heat-shrinkable tubes.The gel rate,the mechanical performance and electrical performance were discussed based on the test results.The superiors and the inferiors of the cost of equipment investmest,the control of product quality,the energy-consumption,the reaction time of crosslinking,the real crosslinking degree and the surface quality of product were compared for the three crosslinking methods.