The grafting mass percent of connect black is more than of furnace black because of difference in carboxyl group content.

由于表面羧基含量的差异，接触法炭黑可以获得比炉法炭黑更高的接枝率。

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The changes of intrinsic viscosity and end carboxyl group 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。

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