挤出过程中交联聚氯乙烯的研究

应用过氧化二异丙苯 /苯乙烯 /三乙醇胺体系在挤出过程中实现了聚氯乙烯的一步交联 ,研究了三乙醇胺和过氧化二异丙苯用量对交联产物力学性能及交联凝胶率的影响。研究发现 ,三乙醇胺对PVC交联结构的形成具有明显的促进作用。在苯乙烯用量 5 phr,三乙醇胺用量为 0 33phr时 ,过氧化二异丙苯在 0 15phr取得最佳值 ;当苯乙烯用量 5 phr,过氧化二异丙苯用量 0 15 phr时 ,三乙醇胺用量在 0 4hpr取得最佳值。交联可以使聚合物材料的力学强度得到提高

Studys on the crosslinking of PVC in the process of extrusion

The one step crosslinking of PVC in the process of extrusion was realized using the system made up of dicumyl peroxide/styrene/triethanol amine.The influence of the dosage of dicumyl peroxide and triethanol amine on the tensile strength and gel content of production was studied.The study finds that triethanol amine has an obvious promotion function on the construction of crosslinking structure in PVC.The optimum is obtained when the dosage of styrene is 5 phr,triethanol amine is 0.33 phr,the best dosage of DCP is 0.15 phr and when the dosage of styrene is 5 phr,DCP is 0.15 phr,the best dosage of triethanol amine is 0.4 phr.Crosslinking can promote the mechanical properties of the material.