羧基的

The changes of intrinsic viscosity and end carboxyl group content with temperature and time were studied for poly(trimethylene terephthalate)(PTT), PET and CDP.

研究聚对苯二甲酸丙二醇酯(PTT),PET,CDP在不同温度和时间下的特性粘数和端羧基含的变。

The carboxylic content in oxycellulose was analyzed quantitatively by FTIR using KSCN as internal standard.Calibration curve with good linear relationship was obtained.

以KSCN作为内标，用傅里叶变换红外光法(FTIR)对氧纤维素中的羧基含作分析，得出线性关系较好的标准曲线。