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Eco-Friendly Adhesion of Isosorbide-Based Polycarbonate
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Researchers investigated the adhesion performance of isosorbide-based polycarbonate (ISB-PC) with a conventional poly(vinyl alcohol) glue, finding that adding 1 wt% of a vinyl alcohol-butenediol copolymer to ISB-PC greatly improved lap-shear strength. The improvement was attributed to dissolution of the copolymer chains in the ISB-PC matrix, enabled by its low water contact angle, while maintaining optical transparency.
We investigated the practical adhesion of a conventional poly(vinyl alcohol) glue with a glassy isosorbide-based polycarbonate (ISB-PC) comprising isosorbide and 1,4-cyclohexanedimethanol. The addition of 1 wt.% of a copolymer of vinyl alcohol and butenediol to the ISB-PC greatly improved its lap-shear strength. This improvement may be attributed to the dissolution of the copolymer chains in the ISB-PC, which had a low water droplet contact angle. Furthermore, the blend was transparent because most of the copolymer chains dissolved in the ISB-PC. Microplastics present a serious environmental issue, even for adhesives. Therefore, the present technique to modify ISB-PC to show good lap-shear strength with a biodegradable glue is attractive.
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