文章摘要
聚对苯二甲酸丁二醇酯(PBT)/阻燃剂填充PBT交替层状复合材料阻燃和力学性能
Flame-Retarding and Mechanical Properties of Polybutylene Terephthalate (PBT)/ Flame Retardant Filled PBT Multilayer Composites
  
DOI:10.16865/j.cnki.1000-7555.2018.04.006
中文关键词: 聚对苯二甲酸丁二醇酯  交替层状  阻燃性能  力学性能
英文关键词: polybutylene terephthalate  alternating multilayer structure  flame retardancy  mechanical properties
基金项目: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)
作者单位
殷 敏, 杨 志, 沈佳斌, 郭少云 四川大学高分子研究所 高分子材料工程国家重点实验室四川 成都 610065 
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中文摘要:
      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。
英文摘要:
      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.
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