摘要
聚对苯二甲酸丁二醇酯 (PBT)处于玻璃化温度以上的潮湿环境中时 ,由于其自有端羧基催化的酸性水解过程具有自加速的特点 ,造成材料力学性能急剧下降 .通过封闭PBT的端羧基 ,使端羧基浓度下降到 10meq/kg以下 ,并且添加抗水解稳定剂 ,消耗水解过程新生的端羧基 ,以减缓PBT的酸性水解速度 。
In this paper, several methods had been used to improve the hydrolysis resistance of poly butylene terephthalate(PBT). The experimental results show that low initial carboxylic end group concentration leads to a high hydrolysis resistance by using an epoxy to end cap the initial carboxylic end groups or chain extender to link PBT molecular. The hydrolysis resistant property of PBT resin can be greatly improved by adding a hydrolytic stabilizer. The hydrolytic stabilizer can react with carboxylic end group produced in hydrolysis progress of PBT. The hydrolysis reaction catalyzed by carboxylic end groups is an auto acceleration reaction and leads to sharp decline in material properties.
出处
《材料科学与工艺》
EI
CAS
CSCD
2001年第3期312-315,共4页
Materials Science and Technology
