阳离子染料易染改性聚酯的固相缩聚工艺与性能
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摘要
为改善常压型阳离子染料易染聚酯(ECDP)纤维的力学性能,通过提高其切片特性黏度的方法,以熔融缩聚制得的ECDP切片为原料,通过固相缩聚法对其进行增黏得到增黏切片。借助乌氏黏度计、差示扫描量热仪、X射线衍射仪、荧光光谱仪和热失重分析仪等对增黏切片的性能进行测试与表征。结果表明:ECDP切片的固相增黏工艺最佳条件为温度190℃,时间9 h;随着反应温度的升高或反应时间的增加,切片的特性黏度增加,且特性黏度与时间的平方根成线性关系;在190℃、9 h条件下增黏的切片特性黏度为0. 69 d L/g,高于该温度或时间时,切片发生热降解,表面开始变黄。
In order to improve mechanical properties of easy cationic dye-modified polyester( ECDP)fiber,a method for improving the intrinsic viscosity of the slices was proposed. ECDP slices prepared by melt polycondensation as raw material were tackified by solid-phase polycondensation to obtain tackified slices. Ubbelohde viscometer, differential scanning calorimeter, X-ray diffractometer, fluorescence spectrometer,and thermogravimetric analyzer were employed to investigate the properties of ECDP slices.The results show that the optimum solid phase tackifying process conditions for ECDP slices are temperature of 190 ℃ and time of 9 h. The intrinsic viscosity of ECDP slices increases with the reaction temperature or reaction time,and the intrinsic viscosity is linear with the square root of time. The intrinsic viscosity of the slices tackified at 190 ℃ for 9 h is 0. 69 dL/g. Under the conditions of higher than the reaction temperature or longer than the time,the surface of ECDP starts to become yellow due to thermal degradation.
In order to improve mechanical properties of easy cationic dye-modified polyester( ECDP)fiber,a method for improving the intrinsic viscosity of the slices was proposed. ECDP slices prepared by melt polycondensation as raw material were tackified by solid-phase polycondensation to obtain tackified slices. Ubbelohde viscometer, differential scanning calorimeter, X-ray diffractometer, fluorescence spectrometer,and thermogravimetric analyzer were employed to investigate the properties of ECDP slices.The results show that the optimum solid phase tackifying process conditions for ECDP slices are temperature of 190 ℃ and time of 9 h. The intrinsic viscosity of ECDP slices increases with the reaction temperature or reaction time,and the intrinsic viscosity is linear with the square root of time. The intrinsic viscosity of the slices tackified at 190 ℃ for 9 h is 0. 69 dL/g. Under the conditions of higher than the reaction temperature or longer than the time,the surface of ECDP starts to become yellow due to thermal degradation.
引文
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