聚对苯二甲酸丙二醇酯的无卤阻燃化改性

聚对苯二甲酸丙二醇酯作为新型聚酯材料,具有非常优良的性能,但其易燃性很大的限制了它的应用范围。为了提高对苯二甲酸乙二醇酯的阻燃性能,本文以无卤膨胀型EPFR-300A为阻燃改性剂,马来酸酐接枝聚烯烃(POE-g-MAH)弹性体为增韧剂,对聚对苯二甲酸丙二醇酯树脂(PTT)进行阻燃改性。通过热重分析仪(TGA)、示差扫描量热仪(DSC)、扫描电子显微镜(SEM)、力学性能等技术手段研究了阻燃剂和增韧剂对PTT树脂力学、热学和阻燃性能的影响。结果表明,增韧剂POE和POE-g-MAH的添加提高了PTT树脂的综合力学性能。当质量分数相同时,POE-g-MAH对PTT树脂的增韧效果要优于POE,且当POE-g-MAH质量分数为7%时,综合力学性能最佳。当添加相同质量分数增韧剂,EPFR-300A质量分数达到20%时,阻燃PTT材料阻燃性能最佳,极限氧指数(LOI)达到28.0%,垂直燃烧阻燃等级达到UL94 V-0级。EPFR-300A阻燃剂与PTT树脂间相容性良好,可以有效地促进PTT树脂成炭并提高材料的阻燃性能。

Halogen Free Flame Retardant Modification of Polytrimethylene Terephthalate

Poly(trimethylene terephthalate), as a new polyester material, has excellent properties, but its flammability limits its application range. In order to improve the flame retardant properties of ethylene terephthalate. In this paper, the flame retardant modification of poly(ethylene terephthalate) resin(PTT) was carried out by using non-halogen expansion EPFR-300A as flame retardant modifier, and maleic anhydride grafted polyolefin elastomer(POE-g-MAH) as toughening agent. The effects of flame retardant and toughening agents on the mechanical, thermal and flame retardant properties of PTT resin were studied by thermal gravimetric analyzer(TGA), differential scanning calorimeter(DSC), scanning electron microscope(SEM) and mechanical properties. The results show that the mechanical properties of PTT resin are improved by the addition of POE and POE-g-MAH. When mass fraction is the same, toughening effect of POE-g-MAH on PTT resin is better than that of POE, and mechanical properties are the best when mass fraction of POE-g-MAH is 7%. When the same content of toughening agent is added, mass fraction of EPFR-300A reaches 20%, flame retardant property is the best, limit oxygen index reaches 28.0%, and vertical combustion flame retardant grade reaches UL94 V-0. The compatibility between EPFR-300A flame retardant and PTT resin is good, and it can effectively promote PTT resin into carbon and improve flame retardant properties of the material.