The reasons for the carboxylendgroup fluctuation of bottle grade PET base chips were analysed.
对瓶用基片端羧基波动的原因进行了分析。
2
Another end for the hydroxyl and the carboxylgroup, has the water affinity.
另一端为羟基和羧基，具有亲水性。
3
The changes of intrinsic viscosity and endcarboxylgroup content with temperature and time were studied for poly(trimethylene terephthalate)(PTT), PET and CDP.
研究了聚对苯二甲酸丙二醇酯（ PTT） ， PET ，C DP在不同温度和时间下的特性粘数和端羧基含量的变化。