# Eco-Friendly Adhesion of Isosorbide-Based Polycarbonate

## TL;DR

This paper explores an eco-friendly way to improve adhesion of a polycarbonate material using a modified adhesive.

## Contribution

A 1 wt.% addition of a vinyl alcohol and butenediol copolymer significantly enhances adhesion to isosorbide-based polycarbonate.

## Key findings

- Adding 1 wt.% of a specific copolymer improves lap-shear strength of isosorbide-based polycarbonate.
- The copolymer dissolves in the polycarbonate, leading to transparency and low contact angle.
- The method offers an eco-friendly alternative to traditional adhesives by reducing microplastic pollution.

## Abstract

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.