Metal hydroxides （MAH） consisting of magnesium hydroxide and aluminum hydroxide with a mass ratio of 1：2 were surface-modified by y-diethoxyphosphorous ester propyldiethoxymethylsilane, boric acid and diphenylsilan...Metal hydroxides （MAH） consisting of magnesium hydroxide and aluminum hydroxide with a mass ratio of 1：2 were surface-modified by y-diethoxyphosphorous ester propyldiethoxymethylsilane, boric acid and diphenylsilanediol in xylene under dibutyl tin dilaurate catalyst at 140 ℃. Phosphorus, silicon and boron elements covalently bonded to metal hydroxide particles were detected by X-ray photoelectron spectroscopy. The degradation behavior of the surface-modified MAH was characterized by thermogravimetric analysis. The results show that linear low density polyethylene （LLDPE） composite, filled with 50% （mass fraction） of MAH modified by 5.0% （mass fraction） of modifiers, passes the V-0 rating of UL-94 test and shows the limited oxygen index of 34%, and its heat release rate and average effective heat combustion in a cone calorimeter measurement decrease obviously; The mechanical properties of MAH can be improved by surface-modification. The uniform dispersion of particles and strong interfacial bonding between particles and matrix are obtained.展开更多
总结了近年来国内外关于无卤阻燃剂阻燃乙烯-醋酸乙烯酯共聚物(EVA)的研究进展。通过氧指数、垂直燃烧等级、锥形量热仪热参数等性能指标,对不同无卤阻燃剂(主要是氢氧化铝、氢氧化镁、天然氢氧化物和膨胀阻燃剂)和协同阻燃剂(主要是红...总结了近年来国内外关于无卤阻燃剂阻燃乙烯-醋酸乙烯酯共聚物(EVA)的研究进展。通过氧指数、垂直燃烧等级、锥形量热仪热参数等性能指标,对不同无卤阻燃剂(主要是氢氧化铝、氢氧化镁、天然氢氧化物和膨胀阻燃剂)和协同阻燃剂(主要是红磷、硼酸锌、硅化合物等)阻燃 EVA 的方法和效果进行了综述和比较。对无卤阻燃材料所采用的阻燃剂的种类、特点和阻燃机理进行了详细介绍。最后对 EVA 无卤阻燃材料的发展前景进行了展望。展开更多
基金Project(20574020) supported by the National Natural Science Foundation of ChinaProject(20061001) supported by the Opening Project of the Key Laboratory of Polymer Processing Engineering, Ministry of Education, ChinaProject (20060106-2) supported by Guangdong Key Projects
文摘Metal hydroxides （MAH） consisting of magnesium hydroxide and aluminum hydroxide with a mass ratio of 1：2 were surface-modified by y-diethoxyphosphorous ester propyldiethoxymethylsilane, boric acid and diphenylsilanediol in xylene under dibutyl tin dilaurate catalyst at 140 ℃. Phosphorus, silicon and boron elements covalently bonded to metal hydroxide particles were detected by X-ray photoelectron spectroscopy. The degradation behavior of the surface-modified MAH was characterized by thermogravimetric analysis. The results show that linear low density polyethylene （LLDPE） composite, filled with 50% （mass fraction） of MAH modified by 5.0% （mass fraction） of modifiers, passes the V-0 rating of UL-94 test and shows the limited oxygen index of 34%, and its heat release rate and average effective heat combustion in a cone calorimeter measurement decrease obviously; The mechanical properties of MAH can be improved by surface-modification. The uniform dispersion of particles and strong interfacial bonding between particles and matrix are obtained.
文摘总结了近年来国内外关于无卤阻燃剂阻燃乙烯-醋酸乙烯酯共聚物(EVA)的研究进展。通过氧指数、垂直燃烧等级、锥形量热仪热参数等性能指标,对不同无卤阻燃剂(主要是氢氧化铝、氢氧化镁、天然氢氧化物和膨胀阻燃剂)和协同阻燃剂(主要是红磷、硼酸锌、硅化合物等)阻燃 EVA 的方法和效果进行了综述和比较。对无卤阻燃材料所采用的阻燃剂的种类、特点和阻燃机理进行了详细介绍。最后对 EVA 无卤阻燃材料的发展前景进行了展望。
