Christian Lenges

Business Development Leader

DuPont BioMaterials


Leading Business Development to create new BioMaterials businesses in DuPont. From ideation to development and venture launch of emerging growth businesses to make industrially important chemicals and materials from renewable feedstocks. Extended experience in a variety of businesses and functions in DuPont focused on Biomaterials businesses since 2008 to select and develop the current industry-leading biomaterials portfolio.

Presentation Abstract

Engineered polysaccharides: alpha-1,3- glucan polymer as a performance enhancing additive for latex adhesives

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

Presentation Time

Breakout III: Improving adhesion performance

Thursday, 12 September 2019, 14:30 - 15:00

FEICA Conference