摘要
采用聚磷酸铵(APP)对聚乳酸进行阻燃改性,并利用两种不同相对分子质量的聚乙二醇(PEG2000和PEG4000)进行增韧改性,最终制备出了增韧阻燃聚乳酸复合材料。结果表明:PEG2000和PEG4000的加入不同程度地提高了复合材料的断裂伸长率和冲击强度,分别提高到37.1%,2.65kJ/m2和26.7%,3.15kJ/m2;APP的加入使得复合材料的阻燃性能显著提高,极限氧指数最高达到了29.2%,垂直燃烧测试达到UL-94V-0等级。扫描电镜结果表明:复合材料的断面微观形貌由脆性断裂变成了韧性断裂,同时APP在基体中的分散性得到了提高。
Ammonium polyphosphate(APP)was used to modify the flame retardancy of PLA and two kinds of polyethylene glycol(PEG)with different molecular weight were used to modify the toughness of PLA.The toughened flame retardant PLA composites were successfully prepared.The results showed that the elongation at break and impact strength of the composites were enhanced by the presence of the PEG2000 and PEG4000,reaching 37.1%,2.65 kJ/m 2 and 26.7%,3.15 kJ/m 2 respectively.After being loaded with APP,the flame retardant ability of PLA composites was significantly improved,exhibiting a limiting oxygen index of 29.2%and UL-94 vertical burning test rating of V-0.What s more,the scanning electron microscope showed that the microstructure of composite fracture surface had changed from brittle fracture to ductile fracture and the dispersibility of APP particles was also improved in the matrix.
作者
张庆宇
张胜
谷晓昱
李洪飞
孙军
Zhang Qingyu ;Zhang Sheng ;Gu Xiaoyu ;Li Hongfei ;Sun Jun(Beijing University of Chemical Technology,Beijing Key Laboratory of Advanced Functional Polymer Composites,Beijing,100029)
出处
《现代塑料加工应用》
CAS
北大核心
2018年第3期24-27,共4页
Modern Plastics Processing and Applications
基金
北京市自然科学基金(2174083)。
关键词
聚乳酸
聚乙二醇
韧性
阻燃性能
polylactide acid
polyethylene glycol
toughness
flame retardancy
作者简介
张庆宇(1992—),男,硕士,主要从事聚合物阻燃改性的研究。E-mail:2285857404@qq.com。;通信联系人,孙军,E-mail:sunj@mail.buct.edu.cn。
