Table of Contents
ISRN Polymer Science
Volume 2013, Article ID 284683, 10 pages
Research Article

Polydimethylsiloxane and Castor Oil Comodified Waterborne Polyurethane

Shanxi Institute of Applied Chemistry, Taiyuan, Shanxi 030027, China

Received 18 October 2013; Accepted 11 November 2013

Academic Editors: S. Fakirov and J. Puiggali

Copyright © 2013 Xuan Ji et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In view of both improving properties of waterborne polyurethane (WPU) and sufficient utilization of renewable resources, a series of polydimethylsiloxane (PDMS) and castor oil (C.O.) comodified anionic WPUs with internal cross-linking was prepared through a prepolymer mixing process. The chemical structure of synthesized polymers was characterized by Fourier transforms infrared spectroscopy (FT-IR). In comparison with traditional linear WPU synthesized from petroleum-based polyols, these novel WPU films exhibited superior properties in solvent and water resistance, thermal stability, and mechanical strength, which suggest promising applications of these new environmentally friendly materials, particularly in the area of decorative and protective coatings. In addition, the results showed that with the increase in PDMS content in these co-modified WPUs the average particle size, the water resistance, and the thermal stability increased accordingly while the solvent resistance and the mechanical properties decreased.