阳离子染料常压可染新型改性涤纶的热性能及染色性能

Thermal and dyeing properties of novel cationic-dyeable polyester fabrics under atmospheric pressure

针对常规涤纶常压难以上染的问题,对一种新型改性涤纶的热性能和染色性能进行研究。使用扫描电子显微镜、差示扫描量热法和热失重分析等对纤维形貌及热性能进行表征和测试。结果表明：纤维具有纵向沟槽及横向十字形结构;玻璃化转变温度为62℃,结晶温度为131℃,熔点为241℃,初始热分解温度为402.8℃。利用亚甲基蓝上染纤维,测得纤维的染色饱和值为5.8。使用Maxilon阳离子染料（红、金黄、蓝、黑）对织物进行染色并绘制上染速率曲线,结果表明：入染30 min后可达到染色平衡,染色保温时间为30 min,染色样品色牢度均能达到4级左右;黑色染料用量为5%（o.w.f）时,K/S值变化趋于平缓,干湿摩擦牢度为4~5级。

In view of the problem of the conventional polyester fiber on the difficulty in dyeing under atmospheric pressure,the thermal and dyeing properties of a novel modified polyester fiber were studied.The morphology and thermal properties of the fibers were characterized and tested by scanning electron microscopy,differential scanning calorimetry and thermal gravimetric analysis. The results show that the fiber has longitudinal grooves and cross-shaped structures; the glass transition temperature,crystallization temperature,melting point and initial thermal decomposition temperature of fiber are 62,131 and 241 ℃,respectively. The dyeing saturation value of fiber was measured by using methylene blue dye on the fiber,and the dyeing saturation value is 5. 8. The fabrics are dyed with Maxilon cationic dyes（ red,golden yellow,blue and black）,and the dyeing rate curves are drawn. The results show that the dyeing balance can be reached after 30 min,the holding time is 30 min and the color fastness is about 4 grade. The fabric is dyed with Maxilon Black,and the results show that the K / S value tends to be stable when the dye concentration is about 5%（ o. w. f）,and the dry and wet rubbing fastness is 4-5 grade.