碳化二亚胺对PBT材料的湿热老化的影响研究

Effect of Carbodiimide on the Humidity-Heat Aging of PBT Materials

研究了抗水解剂碳化二亚胺对聚对苯二甲酸丁二醇酯(PBT)材料在85℃、85%湿度情况下的湿热老化性能的影响,研究了湿热老化条件下阻燃增强PBT材料的强度、韧性、耐热性和熔体质量流动速率等的变化,研究发现抗水解剂的加入能明显提高阻燃增强PBT材料的耐水解性能,并且随着抗水解剂的增加,阻燃增强PBT材料的耐水解性能明显提升。经过优化后的配方,2 000 h的湿热老化后,拉伸强度、弯曲强度和缺口冲击强度保持率均可以达到95%以上。

The humidity-heat aging properties of the flame retardant reinforced PBT material at 85℃and 85%humidity were studied.The changes of the strength,toughness,heat resistance and melting flowing index of the flame retardant reinforced PBT material under the condition of humidity-heat aging were studied.It is found that the anti hydrolytic agent is the main factor to affect the humidity-heat aging properties of the flame retardant reinforced PBT material.The addition of anti hydrolytic agent can significantly improve the hydrolysis resistance of flame retardant PBT materials.And with the increase of anti hydrolytic agents,the hydrolysis resistance of flame retardant PBT material is obviously improved.After 2000 hours of humidity-heat aging,the retention rate of the tensile strength,bending strength and notch impact strength can reach more than 95%with the optimized formula.