In the PRESERVE project, improving the circularity of bio-based packaging from its origin and design to subsequent life cycles is a top priority. A key aspect is the application of innovative processing technology to enhance the properties of existing bio-based materials for different packaging applications. In addition, new end-of-life options, including innovative upcycling solutions, will be used to ensure that the new packaging solutions to be developed are fit for a truly bio-based, circular economy.

This deliverable D4.2 describes the specifications of electron radiation treatment on selected neat polymer material. As described in D3.6, electron radiation treatment is a technology that allows the modification of polymers by initiation of chemical reactions that result in changes in the molecular weight distribution. The extent of these changes depends on the induction of chain scission and crosslinking. These reactions may occur in parallel with one of them being more dominant. The dominant reaction further depends on the molecular structure of the irradiated material and will be mainly responsible for the subsequent changes in mechanical, optical and barrier properties. The literature mainly describes the effect of high-energy electron irradiation on certain polymer materials such as PE, PET and PP. Nevertheless, it is, among other things, a very time and energy efficient technology. The use of low-energy electron beam irradiation of neat biobased polymer substrates appears to be an attractive approach to improving the mechanical and barrier performance of these materials.

The confidential report provides detailed information on the results of said electron radiation treatment on the mechanical, optical and barrier properties of selected neat biobased materials that are used within the PRESERVE project to develop new packaging solutions.