CAJ | 학술논문

制备了丙烯酸(AA)接枝线型低密度聚乙烯(PE–LLD)(PE–g–AA)高分子偶联剂，并将其用于改性 PE–LLD／Al(OH)3复合材料。研究了 PE–g–AA 对 PE–LLD／Al(OH)3复合材料的微观结构、力学性能、流变行为、电气绝缘性能的影响，并探讨了复合材料力学性能、电气绝缘性能和界面微观结构之间的关系。研究结果表明，PE–g–AA偶联剂显著改善了 Al(OH)3填料与 PE–LLD 基体之间的界面作用机制，不但提高了复合材料的拉伸和冲击强度，而且增加了复合材料的断裂伸长率。另外，PE–g–AA 提高了 Al(OH)3在聚合物基体的分散性并作为绝缘层减少了填料之间的相互接触，因而获得的复合材料的电气绝缘性能在低偶联剂的掺量下大幅提升，达到电气绝缘性能要求。
제비료병희산(AA)접지선형저밀도취을희(PE–LLD)(PE–g–AA)고분자우련제，병장기용우개성 PE–LLD／Al(OH)3복합재료。연구료 PE–g–AA 대 PE–LLD／Al(OH)3복합재료적미관결구、역학성능、류변행위、전기절연성능적영향，병탐토료복합재료역학성능、전기절연성능화계면미관결구지간적관계。연구결과표명，PE–g–AA우련제현저개선료 Al(OH)3전료여 PE–LLD 기체지간적계면작용궤제，불단제고료복합재료적랍신화충격강도，이차증가료복합재료적단렬신장솔。령외，PE–g–AA 제고료 Al(OH)3재취합물기체적분산성병작위절연층감소료전료지간적상호접촉，인이획득적복합재료적전기절연성능재저우련제적참량하대폭제승，체도전기절연성능요구。
Coupling agent of acrylic acid (AA) grafted linear low density polyethylene(PE–LLD) (PE–g–AA) was prepared and used to modify PE–LLD/Al(OH)3 composite. The effect of PE–g–AA coupling agent on microstructure,mechanical properties, rheological behavior and electric insulation performance of PE–LLD/Al(OH)3 composite were investigated. The relationships of mechanical properties,electric insulation properties and interface microstructure were discussed . The results show that the coupling agent improves the interface action of Al(OH)3 and PE–LLD, thus leads to improvement of impact strength,tensile strength and elongation at break. In addition,PE–g–AA coupling agent can improve dispersion of Al(OH)3 in the polymer matrix and sever as insulation layers to reduce the contacts between fillers,thus the electric insulation of the composite is sharply improved with a low loading of coupling agent to meet the performance requirements for electrical insulation.