阻燃EPDM/PP TPV的研究

研究制备工艺和阻燃剂用量对EPDM／PP阻燃热塑性硫化胶（TPV）性能的影响。结果表明，采用十溴联苯醚（FR-10）／三氧化二锑并用阻燃体系，阻燃剂在动态硫化前加入，EPDM／PPTPV的阻燃性能较好，但物理性能稍差，阻燃剂用量较大时，EPDM／PPTPV的阻燃性能较好，但拉伸强度减小；采用FR—10／三氧化二锑／氢氧化镁并用阻燃体系，氢氧化镁在动态硫化前加入，EPDM／PPTPV的阻燃性能稍好，物理性能和挤出外观质量略差，氢氧化镁用量对EPDM／PPTPV的阻燃性能影响不大。采用FR—1O／三氧化二锑／氢氧化镁并用阻燃体系，氢氧化镁在动态硫化前加入，可制备低硬度阻燃低发烟EPDM／PP TPV。

Study on EPDM/PP TPV

The effects of the preparation and the addition level of flame retarder on the properties of flame retardant EPDM/PP TPV were investigated.The results showed that an EPDM/PP TPV with better flame retardance and somewhat poorer physical properties was obtained by using the blending flame retardant system of decabromo-diphenyl oxide(FR-10)/antimony trioxide(Sb_2O_3) adding the flame retarder before dynamic vulcanization,and an EPDM/NBR TPV with better flame retardance and lower tensile strength was obtained by adding high level of flame retarder;and an EPDM/PP TPV with a little better flame retardance and somewhat poorer physical properties and extrudate appearance was obtained by using the blending flame retardant system of FR-10/Sb_2O_3/magnesium hydroxide Mg(OH)_2] and adding Mg(OH)_2 before dynamic vulcanization,and the addition level of Mg(OH)_2 had little effect on the flame retardance of EPDM/NBR TPV.A flame retardant EPDM/NBR TPV with low hardness and smoke emission was obtained by using blending flame retardant system of FR-10/Sb_2O_3/Mg(OH)_2 and adding Mg(OH)_2 before dynamic vulcanization.