The breakthrough could ultimately pave the way for commercial bioplastics.
researchers at the Industrial Sustainable Chemistry group led by Prof. Gert-Jan Gruter presented a simple, yet innovative, synthesis strategy to overcome the inherently low reactivity of biobased secondary diols and arrive at polyesters that have very good mechanical- and thermal properties, and at the same time high molecular weights.
First author of the paper is PhD student Daniel Weinland, who graduated on October 27th, 2022 . In total, 5 PhD students are involved in the RIBIPOL project, of which 2 have defended their thesis recently. However, isosorbide is rather unreactive, and in the past two decades it has proven quite challenging to obtain useful isosorbide-based polyesters. It was nearly impossible to arrive at sufficiently long polymer chains while incorporating sufficiently high amounts of isosorbide .Weinland and his RIBIPOL colleagues have overcome this impasse by incorporating an aryl alcohol in the polymerization process.
The resulting strong plastics outperform existing plastics like PET in terms of heat resistance, which is for instance relevant for reuse – think of washing bottles that takes place at a scalding 85° C. The isosorbide-based polymers also show promising barrier and mechanical properties that can outperform common fossil-based materials.
France Dernières Nouvelles, France Actualités
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