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Preparation and Properties of Waterborne Polyurethanes Based on Mixtures of Hydroxy-Terminated Polybutadiene and Poly(propylene glycol)  

Lee Seon-Suk (Division of Environmental and Chemical Engineering, Chonbuk National University)
Lee Si-Ho (Division of Environmental and Chemical Engineering, Chonbuk National University)
Lee Dai-Soo (Division of Environmental and Chemical Engineering, Chonbuk National University)
Publication Information
Polymer(Korea) / v.30, no.2, 2006 , pp. 152-157 More about this Journal
Abstract
Anionic or Zwitter-ionic waterbone polyurethanes (WPU) based on mixtures of hydroxy terminated poly-butadiene and poly(propylene glycol) were prepared and their physical properties were characterized. Particle size of WPU increased with increasing the content of HTPB. It was observed that the microphase separation of soft segments and hart segments increased with increasing the content of HTPB in the WPUs. Zwitter-ionic WPU showed stronger hydrogen bonds between molecules than anionic WPU after drying. Polyurethane films obtained after drying of WPUs exhibit besmechanical properties when the HTPB content among polyols for WPUs were 25wt%. It is postulated that such mechanical properties resulted from different microphase separation of soft segments and hard segments of polyurethane films obtainec after drying of WPUs.
Keywords
hydroxy-terminated butadiene; anionic waterborne polyurethane; Zwitter-ionic waterborne polyurethanes; poly(propylene glycol); microphase separation;
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