二苯乙烯基苯型荧光增白剂的性能比较OA

The structural characteristics,thermal properties,absorption properties,fluorescence properties and whitening application performance for polyester of three types of distyryl benzene type fluorescent whiten-ing agents were comparatively studied.The influence of structural differences on the performance of this type of whitening agents was mainly discussed.The results showed that compared with ER-Ⅱ,the molecules of ER-Ⅰ and ER-Ⅲ with symmetrical structure were arranged more regularly and orderly,and had better ther-mal stability.ER-Ⅱ had relatively greater polarity,which not only affected the absorption and fluorescence emission characteristics,but also could form a greater affinity with polyester,which was conducive to improv-ing the exhaustion and dyeing rate.