【摘要】 研究了表面改性剂和界面相容剂对氢氧化镁 [Mg (OH) 2 ]在聚乙烯 /醋酸乙烯酯 (EVA)基体中的分散性、Mg (OH) 2 与聚合物的界面以及复合材料性能的影响 ,通过SEM观察了复合材料拉伸断面和切断断面的形貌。结果表明 :不同类型的表面改性剂都能不同程度地改善Mg (OH ) 2 的分散性 ,钛酸酯与其它改性剂相比 ,又大大加强了Mg(OH) 2 与基体的界面作用 ,复合材料表现出较高的拉伸强度和伸长率 ,但体系的粘度上升 ;硬脂酸却弱化了界面作用 ,复合材料的强度下降 ,伸长率上升 ,粘度下降。EVA g MAH作为界面相容剂能够强化界面作用 ,提高复合材料的综合性能。水平燃烧结果表明 ,Mg (OH) 2 在EVA中分散度提高后 ,阻燃性能得到了一定程度的提高 ,当使用具有明显界面作用强化的处理剂时 ,阻燃性能改善最大。更多还原

【Abstract】 The effects of surface modifiers and macromolecular compatilizer on the dispersibility of Mg(OH) 2 in EVA,the interface between Mg(OH) 2 and polymer and the properties of the composites were studied,and the fracture surfaces of the samples were analyzed by means of SEM. The result showed that different kinds of surface-modifiers could improve the dispersibility of Mg(OH) 2 to a certain extent. Compared with other surface-modifiers,titanate had better effect on the dispersibility of Mg(OH) 2 in EVA,resulted in higher tensile strength and elongation,but the viscosity of the composite increased;stearate acid could weaken the interfacial effect,resulted in descended tensile strength and apparent viscosity,but higher elongation. As a macromolecular compatibilizer,EVA-g-MAH could intensify the interfacial effect and improve the comprehensive properties of the composite. The results of horizontal flame experiments showed with the improvement of the dispersibility of Mg(OH) 2 in EVA,the flame resistance of the composite was improved,and when coupling agent was used to intensify the interfacial effect,the flame resistance of the composite was improved to be proper maximum.更多还原