Effects of AAS/DMPA on crystallinity of films of waterborne polyurethane

CAO Gaohua; XIA Zhengbin; ZHANG Yanhong; LI Wei

doi:10.3969/j.issn.0438-1157.2013.07.049

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Effects of AAS/DMPA on crystallinity of films of waterborne polyurethane

更新时间：2025-12-10

- Effects of AAS/DMPA on crystallinity of films of waterborne polyurethane
- CIESC Journal Issue 7, Pages: 2672-2678(2013)
- 作者机构：
  
  华南理工大学化学与化工学院,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.07.049
  CLC： Q323.8TQ430.1
- Online First：05 July 2013，
  
  Published：05 July 2013
- 稿件说明：
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CAO Gaohua, XIA Zhengbin, ZHANG Yanhong, et al. Effects of AAS/DMPA on crystallinity of films of waterborne polyurethane[J]. CIESC Journal, 2013, (7): 2672-2678.
DOI：

CAO Gaohua, XIA Zhengbin, ZHANG Yanhong, et al. Effects of AAS/DMPA on crystallinity of films of waterborne polyurethane[J]. CIESC Journal, 2013, (7): 2672-2678. DOI： 10.3969/j.issn.0438-1157.2013.07.049.

摘要

以聚己二酸1

4-丁二醇酯(PBA)、六亚甲基二异氰酸酯(HDI)、异佛尔酮二异氰酸酯(IPDI)为主要原料

以混合的乙二胺基乙磺酸钠(AAS)和二羟甲基丙酸(DMPA)为亲水性扩链剂

通过丙酮法合成了固含量为50%的磺酸/羧酸盐型水性聚氨酯(WPU)乳液。采用DSC、XRD、透光率等测试技术表征了AAS/DMPA摩尔比对WPU胶膜结晶性的影响

并从吸水率和热失重两个方面分析了结晶性对胶膜耐水性和耐热性的影响。研究结果表明

随着AAS/DMPA摩尔比的增大

WPU胶膜的结晶性提高

胶膜的耐水性和耐热性在一定程度上得到了改善。

Abstract

Waterborne polyurethane (WPU)with 50% solid content were synthesized by using polyethylene glycol adipate diol (PBA)

isophorone diisocyanate (IPDI)and hexamethylene diisocyanate (HDI)as main raw materials

N-(2-aminoethyl)-amino ethane sulphonated sodium (AAS)and dimethylol propionic acid (DMPA)as hydrophilic chain extender.The effects of AAS/DMPA molar ratio on crystallinity of WPU film were investigated by means of DSC

XRD and light transmittance measurement

and in turn the influence of crystallinity on water resistance and heat resistance was also studied by experiments of water absorption and thermal stability of WPU films.The results showed that with the increase of AAS/DMPA

relative crystallinity of the WPU films was enhanced.Consequently

to some degree

water resistance and heat resistance of WPU films were improved.

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