摘要
采用高速混合机将低熔点的聚己内酯(PCL)包覆在Al(OH)3表面,然后通过熔融混炼法分别制备了包覆Al(OH)3、未包覆Al(OH)3以及纯PCL填充聚乳酸(PLA)的复合材料,研究了包覆前后的Al(OH)3及其与PLA复合材料的微观形态,以及复合材料的力学性能、流变性能、热性能和降解性能。结果表明:PCL包覆Al(OH)3填充PLA可以显著提高复合材料的拉伸性能,当Al(OH)3/PCL=100/20时,在PLA中加入5phr包覆Al(OH)3后,复合材料的断裂伸长率可以提高到176%;PCL能有效改善包覆Al(OH)3颗粒在PLA中的分散性及与PLA之间的界面结合力,同时,填料表面多余的PCL能以微球粒子形式分散在PLA中,起到良好的增塑作用;少量包覆Al(OH)3能显著提高PLA的结晶度降,低其结晶温度促,进其降解。
AI（OH）3 was coated with PCL which has a low melting point by high-speed mixer. PLAJAI（OH）3, PLA/coated AI（OH）3 and PLA/PCL composites were prepared through melt mixing respectively. The micromorphology of AI（OH）3 before and after coating, as well as PLA composites was observed. The mechanical property, rheological property, thermal property and degradation property of the composites were also investigated. The results show that PCL coated AI（OH）3 improves the tensile property of PLA composites, when coated AI（OH）3 （AI（OH）3/PCL=I00/20） content is 5 phr, the elongation at break of the composite is up to 176%; the dispersion of AI（OH）3 in PLA and the interaction between AI（OH）3 and PLA are effectively improves by PCL; meanwhile, the extra PCL disperses in PLA in a form of microsphere, plays an excellent role in plasticization; a small amount of coated AI（OH）3 can increase the crystallinity, reduce the crystallization temperature and accelerate the degradation of PLA obviously.
出处
《塑料科技》
CAS
北大核心
2010年第10期68-72,共5页
Plastics Science and Technology
