by 2019 Abstracts No Comments

Polysaccharides are important biopolymers with a wide range of industrial and consumer product applications. Historically, polysaccharides such as starch and starch derivatives have been used in material science for a range of adhesive applications.

DuPont Industrial Biosciences has developed a family of engineered polysaccharides through the selective polymerisation of sucrose to provide materials with a range of molecular weights, solubility, and polymer architecture and particle morphology. The underlying enzymatic polymerisation process offers the opportunity to design the polymer structure and the material properties of these new biomaterials.

One specific example, the linear alpha-1,3-polyglucose, has been assessed in adhesive applications. 

This work will focus on the incorporation of alpha-1,3-polyglucose as a performance enhancing additive in polyvinyl alcohol stabilised polyvinyl acetate copolymer latexes. The glucan polymer was incorporated as a dry powder and the adhesive solids adjusted for comparative purposes. Adhesive performance was measured using ASTM Standard Method D-905 on Hard Maple (Acer saccharum) and ASTM D-906 on yellow poplar (Liriodendron tulipifera) plywood veneer. Dynamic Mechanical Analysis (DMA) and Nuclear Magnetic Resonance (NMR) spectroscopy reveal unique molecular interactions between the alpha-1,3-polyglucose and the latex polymers to provide significant improvements in adhesive strength and wood failure performance.

 

Co-authors: Kyle Kim, Joseph J. Marcinko

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