This paper reports the hydrolysis of several PBT materials (pigmented or not). Degradation was monitored by gel permeation chromatography (chain scission), DSC (crystalline morphology), tensile test (residual mechanical properties) and DVS (polymer-water interaction). The embrittlement comes from chain scission associated with a small chemicrystallization effect. Results lead to the proposal of a kinetic model for the chain scission rate aimed to describe the auto-acceleration effect induced by carboxylic acids (chain ends) and successfully compared to results both from this work or literature. The mixed “average molar mass – crystallinity” criterion proposed in a previous paper was specified. At last, the effect of pigments is illustrated and shows that carbon black (present in particular in one masterbatch) plays an aggravating role on hydrolysis.

本文报告了几种 PBT 材料（有色或无色）的水解。通过凝胶渗透色谱（断链）、DSC（结晶形态）、拉伸试验（残余机械性能）和 DVS（聚合物-水相互作用）监测降解。脆化来自与小的化学结晶效应相关的断链。结果导致提出了断链速率的动力学模型，旨在描述由羧酸（链端）引起的自动加速效应，并成功地与这项工作或文献的结果进行比较。指定了先前论文中提出的混合“平均摩尔质量 - 结晶度”标准。最后，