无卤阻燃聚乙烯复合材料的研究

Study on Non-halogen Flame-retardant Polyethylene Composite

本研究以低密度聚乙烯（ＬＤＰＥ）为基础树脂，用多种三元乙丙橡胶（ＥＰＤＭ）作改性剂，研究不同ＥＰＤＭ、无机阻燃剂和红磷对材料性能的影响。研究结果表明ＬＤＰＥ／ＥＰＤＭ共混多相聚合物比ＬＤＰＥ有更强的韧性，还可增加无机阻燃剂的添加量。当加入适当的三水合氢氧化铝（ＡＴＨ）和红磷时，可获得无卤阻燃聚乙烯材料，其极限氧指数（ＬＯＩ）可达３０、电导率为４０μｓ／ｃｍ，ｐＨ值为５．０。可望作热塑性无卤阻燃聚乙烯电缆料。

Using LDPE as the base resin,the effects of different EPDM ternary copolymers, as a modifier,and inorganic flame retardants and red phosphor on the properties of this composite were studied.The results showed LDPE/EPDM multiphase polymer blend is tougher than LDPE,and the inorganic flame retardants loadings may be increased.As proper amounts of Aluminium trihydrate and red phosprhor were added, an non-halogen flame retardant PE composite can be obtained with limiting oxtygen index (LOI) up to 30 and 40μs/cm of conductivity and 5.0 of PH value, promising to be used as thermoplastic non-halogen flame retardant PE cable compounds.