Abstract

ABSTRACTSeveral new eco‐friendly materials have the potential to replace conventional petroleum‐derived materials and monomers. Among them are natural polysaccharides. The use of polysaccharides in polyurethane (PU) synthesis has not yet been studied extensively, even though as multihydroxyl compounds, they can easily serve as crosslinkers in PU synthesis. One naturally occurring (hyper‐)branched polymer is amylopectin, a component of starch. In this work, we report the PU synthesis and film‐forming capacity using the asymmetric cyclic aliphatic diisocyanate—isophorone diisocyanate (IPDI) with acetylated and pristine partially hydrolyzed amylopectin/white dextrin (AVEDEX W80) as a crosslinker. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47454.

Highlights

  • Polyurethanes (PUs) are high-performance polymers that show excellent properties, such as chemical, abrasion, and scratch resistance, as well as flexibility and toughness

  • The use of carbohydrates in PU synthesis has not yet been studied extensively, even though, as multihydroxyl compounds, they can serve as crosslinkers in PU synthesis

  • We reported the esterification of white dextrines and “waxy potato” starch containing more than 95% amylopectin.[28]

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Summary

INTRODUCTION

Polyurethanes (PUs) are high-performance polymers that show excellent properties, such as chemical, abrasion, and scratch resistance, as well as flexibility and toughness. We reported the esterification (acetylation, propionation, and esterification with longer fatty acids) of white dextrines (degraded starches) and “waxy potato” starch containing more than 95% amylopectin.[28] A very important feature of this reaction is the fact that the esterified material does not undergo a color change due to the mild reaction conditions. This can be very important for various industrial applications, such as coatings, films, and so on. We report the PU synthesis and film-forming capacity using the asymmetric cyclic aliphatic diisocyanate— isophorone diisocyanate (IDPI) and acetylated and pristine partially hydrolyzed amylopectin/white dextrin (AVEDEX W80) as a crosslinker

MATERIALS AND METHODS
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