Structure Development in Cross-Linked, Soybean Oil-based Waterborne Polyurethanes

Document Type

Article

Publication Title

Journal of Polymers and the Environment

ISSN

1572-8919

Volume

33

First Page

2091

Last Page

2108

Publication Date

8-2024

Abstract

Development of waterborne polyurethanes (WPU) using bio-based sources represents a step towards sustainable materials science and industry. We synthesized bio-based cationic water-dispersed crosslinked polyurethanes from high oleic soybean oil (HOSO) polyol, isophorone diisocyanate, and methyldiethanol amine, with varying ionic group contents after neutralization with acetic acid. Our primary objective was to analyze how crosslinking affects the dispersion process and film properties in multifunctional systems. The synthesis-structure-property relationship is elucidated through comprehensive analyses of the products at different stages of the synthesis. The dispersion of the WPU particles in water must occur prior to gelation during the final preparation, leading to incomplete conversion and the formation of imperfect networks. Insight into the synthesis process and polymer structure was gained by simulating polymer network parameters. Morphological analyses using synchrotron-based X-ray scattering and atomic force microscopy revealed a hierarchical structure within the WPU films. Importantly, all the films prepared in this study, without using coalescence agents, have low water absorption and high water contact angles, demonstrating their potential for textile and leather coatings and other applications.

Comments

This work was originally published in the Journal of Polymers and the Environment. Information for this article is on Digital Commons to keep record of work by Pittsburg State University employees. Partial nor full text of this work is available on this site, per publisher terms and conditions, and can only be accessed online through the original journal.

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