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。
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.
出处
《塑料工业》
CAS
CSCD
北大核心
2003年第12期8-12,共5页
China Plastics Industry
基金
北京市自然科学基金重点课题 ( 2 0 3 10 0 1)
北京市科技新星计划 (H0 10 410 0 10 112 )
人事部留学归国人员科技活动择优资助项目
关键词
表面改性
氢氧化镁
阻燃剂
界面相容剂
分散
EVA-g-MAH
Magnesium Hydroxide
Surface Modification
Flame-retardation
Interfacial Compatibilizer
Dispersion
EVA-g-MAH
