摘要
利用微层共挤出技术制备了不同层数的聚对苯二甲酸丁二醇酯(PBT)/阻燃剂(FR)填充的PBT交替层状复合材料,研究层数和层厚对复合材料阻燃性能和力学性能的影响。研究表明,随着层数的增加,体系的阻燃和力学性能均显著提高。当层数由2层增加到64层,材料的极限氧指数从20%提高到了25.5%,拉伸强度提高了4.3%,断裂伸长率保持稳定。这为制备兼具优异阻燃和力学性能的PBT复合材料提供了新的思路和途径。
Polybutylene terephthalate（PBT）/flame retardant filled PBT （PBTFR） multilayer composites with different layer numbers were fabricated through layer-multiplying coextrusion technology. The distribution of flame retardants was controlled by changing the layer numbers which was examined through the polarized light photographs. With the increase of layer numbers, both the flame retardancy and tensile properties are improved. Compared with the 2-layer specimen, the LOI of the 64-layer one is increased from 20 % to 25.5 % and the UL-94 rating is upgraded to V-0. It is considered that the multilayered distribution of FRs is beneficial to promote the formation of continuous char layers and retard the melt dripping. In addition, the tensile strength is increased by about 7 % but the elongation at break is almost unchanged. This method may provide a new way to improve both the flame retardancy and mechanical properties of PBT composites.
作者
殷敏
杨志
沈佳斌
郭少云
Min Yin;Zhi Yang;Jiabin Shen;Shaoyun Guo(Polymer Research Institute of Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第4期32-36,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51673136)
高分子材料工程国家重点实验室优秀青年人才项目(sklpme2015-3-03)
关键词
聚对苯二甲酸丁二醇酯
交替层状
阻燃性能
力学性能
polybutylene terephthalate
alternating multilayer structure
flame retardancy
mechanical properties
