Monocomponent Waterborne Polyurethane Adhesives: Influence of the Crosslinking Agent on Their Properties |
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| Authors: | Dongya Yang Li Han Hanqing Zhang Fengxian Qiu |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang, Jiangsu, P.R. China;2. Jiangsu Province Key Laboratory of Fine Petro-chemical Technology , Changzhou, Jiangsu, P.R. China;3. School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang, Jiangsu, P.R. China |
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| Abstract: | To improve the properties of the monocomponent waterborne polyurethane (WPU) adhesives, a series of crosslinked WPU were prepared with trifunctional polyester polyol (P210) as crosslinking agent. The crosslinked WPU dispersions and their films were characterized by conventional methods. The adhesion property of the samples was measured from T-peel test of leather/WPU adhesive/leather joints. Compared with the linear one, the crosslinked WPU exhibited low viscosity, small particle size, and low surface tension. For crosslinked films, the thermal stability, water resistance and mechanical properties were remarkably enhanced. The experimental data of T-peel test indicated that the adhesive strength significantly increased to 4.8 KN/m by crosslinking up to the optimum crosslink index of 1.2 and then showed a small decrease with excess. |
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| Keywords: | Waterborne polyurethane adhesive mechanical property crosslinking |
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