阳离子易染共聚酯的热性能研究

在半连续大装置上合成了含第三单体间笨二甲酸乙二脂-5-磺酸钠(SIPE),第四单体聚乙二醇(PEG)的阳离子易染共聚酯(ECDP);采用热失重分析、差示扫描量热法对ECDP的热性能进行了研究,并对ECDP切片干燥和熔融过程的特性粘数降进行了测试.结果表明:随行PEG含量的增加,ECDP的热分解温度下降,玻璃化转变温度相...

Thermal properties of cationic dyeable copolyester

A cationic dyeable copolyester(ECDP) was synthesized by adding the third monomer,5-sodium suflo bis-(hydroxyethyl) isophthalate(SIPE),and the fourth monomer,polyethylene glycol(PEG),on a semicontinuous polymerization unit.The thermal properties of ECDP were studied by thermogravimetric analysis and differential scanning calorimetry.The intrinsic viscosity drop of ECDP chip was tested during the drying and melting process.The results showed that the thermal decomposition temperature of ECDP was decreased and the glass transition temperature was also decreased accordingly with the addition of PEG;the cold crystallization temperature and melting point were affected by the combination of SIPE and PEG;the residence time had an increasing effect on the intrinsic viscosity drop of ECDP melt while increasing PEG amount;The quality of dried chips could be ensured by selecting relatively low drying temperature and long residence time for ECDP with high PEG content.