硅烷交联聚乙烯电缆料的研制

Development of Silicon Cross-linked Polyethylene Cable Materials

研究探讨了硅烷交联聚乙烯4种不同分子结构(LDPE、LDPE/LLDPE、LDPE/LLDPE/HDPE、LLDPE/HDPE)的树脂对产品加工性能及综合力学性能的影响;考察了3种硅烷接枝单体(A-151、A-171、A-172)、2种自由基捕捉剂(K1、K2)对产品凝胶率及加工性能的影响,成功地解决了在硅烷接枝反应过程中碳-碳大分子交联的问题,使产品具有较高凝胶率的同时具有较好的加工性能;通过正交设计优化了引发剂、接枝单体、催化剂以及自由基捕捉剂的最佳用量,以最佳配比生产的硅烷交联聚乙烯电缆料的性能达到了硅烷交联聚乙烯电缆料的指标要求。

The effect of four different molecular structures（LDPE,LDPE/LLDPE,LDPE/LLDPE/HDPE,LLDPE/HDPE）of basic resin on processability and mechanical property of silicon grafted cross-linking polyethylene cable materials was studied.The impact of three silicon monomers（A-151,A-171,A-172）and two radical captures（K1,K2）on gel rate and processability of the products was discussed.The problem about carbon-carbon macromolecule cross-linking during silicane graft reaction was solved,and products gained higher gel rate and good processability.Dosages of initiator,silicon monomer,catalyst and free radical capture were optimized by orthogonal design.The performances of silicon cross-linking cable material produced under the best ratio achieved the index requirement of silicon cross-linking cable material.