Study on hydrolysis-resistant poly(butylene terephthalate) (PBT)

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.