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化工学报  2015 

羧酸盐/磺酸盐复合型WPU胶黏剂的制备与表征

DOI: 10.11949/j.issn.0438-1157.20150309, PP. 4258-4267

Keywords: 磺酸盐/羧酸盐,水性聚氨酯,稳定性,乳液,复合材料

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Abstract:

在以丙酮法合成固含量约为50%的磺酸盐WPU乳液胶黏剂的研究基础上,以羧酸盐改性磺酸盐WPU乳液胶黏剂制备复合型胶黏剂,研究了羧酸盐改性对磺酸盐型WPU胶黏剂性能的影响。结果表明,当DMPA用量1.6%,A95用量1.8%,聚酯多元醇中n(PBA2000)/n(PBA3000)为4/6,多异氰酸酯中n(HDI)/n(IPDI)为4/6时,WPU乳液黏度适中,分散稳定,耐水性良好,力学性能及粘接性能优异。红外光谱分析表明,成功合成了复合型WPU;DSC分析表明复合型WPU熔融温度约为48.03℃,磺酸盐WPU熔融温度为45.52℃,复合型WPU成峰面积更大,结晶性能更优;TEM分析显示,两种WPU乳液粒子均呈球形,均匀分散,粒径分布分析显示复合型WPU乳液粒径分布较磺酸盐WPU乳液更宽;GPC分析表明两种WPU分子量接近,改性对相对分子质量的影响不大;TGA分析表明550℃时到达热分解终点,磺酸盐WPU耐热性能稍占优势;综合性能分析结果显示两种胶黏剂都显示出良好的耐热性,力学性能及粘接性能方面,复合型WPU乳液胶黏剂明显有较大提高,同时其性能相比传统方法合成的羧酸/磺酸盐WPU也有较大提高。

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