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Preparation and Properties of Waterborne Polyurethane-Urea/Poly(vinyl alcohol) Blends for High Water Vapor Permeable Coating Materials  

Yun, Jong-Kook (Korea Institute of Footwear & Leather Technology)
Yoo, Hye-Jin (Division of Chemical Engineering, Pusan National University)
Kim, Han-Do (Division of Chemical Engineering, Pusan National University)
Publication Information
Macromolecular Research / v.15, no.1, 2007 , pp. 22-30 More about this Journal
Abstract
High water vapor permeable coating materials were prepared by blending aqueous poly(vinyl alcohol) (PVA) solution with waterborne polyurethane-urea (WBPU) dispersions synthesized by prepolymer mixing process. Stable WBPU/PVA dispersions were achieved at PVA content below 30 wt%. As the water soluble polymer PVA content increased, the number and density of total micro-pores (tunnel-like/isolated micro-pores) formed after the dissolution of PVA in water increased, and the water vapor permeability of coated Nylon fabric also increased significantly. Using WBPU/water soluble polymer PVA blends as a coating material and then dissolving PVA in water was confirmed to be an effective method to obtain prominent breathable fabrics.
Keywords
waterborne polyurethane; poly(vinyl alcohol); water vapor permeability; dissolution; micro-pore;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 13  (Related Records In Web of Science)
Times Cited By SCOPUS : 10
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