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化工学报  2015 

一种磺酸型水性聚氨酯扩链剂的合成、表征及应用

DOI: 10.11949/j.issn.0438-1157.20141198, PP. 834-842

Keywords: N,N-二(2-羟乙基)-2-氨基丙烯,N,N-二(2-羟乙基)-2-氨基丙磺酸钠,磺化,合成,表征

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Abstract:

以自制的中间体N,N-二(2-羟乙基)-2-氨基丙烯为原料,对其进行磺化反应,控制温度、时间和摩尔比反应合成磺酸型水性聚氨酯扩链剂N,N-二(2-羟乙基)-2-氨基丙磺酸钠,借助核磁氢谱(1HNMR)、红外光谱(FTIR)、元素分析、X射线衍射(XRD)等手段对合成产物进行了组成、结构和结晶性表征,用热重分析仪表征了产物的热稳定性。根据产物的磺化度确定最佳的合成工艺:反应温度为90℃,反应时间为8h,N,N-二(2-羟乙基)-2-氨基丙烯和亚硫酸氢钠(NaHSO3)的物料比为1:2.5,磺化率可达到94%以上。分别以二羟甲基丙酸(DMPA)和自制磺酸型单体作为亲水扩链剂制备羧酸型水性聚氨酯(CWPU)和磺酸型水性聚氨酯(SWPU),其性能对比结果表明:SWPU相比于CWPU具有较好的亲水性和耐热性能;固含量及稳定性方面,SWPU也是优于CWPU的。

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