PVC FORMULATIONS | ADDITIVES


Diederik Goyvaerts, Global Business Development Manager for Polymer Solutions at Clariant. “With both FDA and EFSA approvals for key applications, we’re expanding possibilities for sustainable solutions in food-contact materials.”


Additive research According to a study published in the journal Chem late last year, a research team led by Christo Sevov, an associate professor in chemistry and biochemistry at The Ohio State University, found that using electricity to permanently affix chemical additives to PVC can make it more durable and less likely to shed microplastics. “Instead of mixing in those chemicals, our method involves chemically bonding the plasticiser compound directly to PVC by grafting them onto the backbone of the poly- mer,” explained Sevov. “This is really one of the few examples that we have where there’s this much control over changing the properties of PVC, so this is the first step in controllably modifying PVC to give it properties you’re interested in.” The team did, however, run into challenges.


Synthetic polymer modifications often fail because the reactions were originally developed for


small-molecule analogs, not big-molecule analogs such as pure PVC. To solve this, researchers optimised the catalyst they used in their process. “Many chemists are shifting their efforts to studying big molecules and developing new chemistries for upcycling, recycling and modifying well-known polymers,” Sevov said. “By using the new method, you can potentially reuse the material many, many more times before it really begins to fall apart, improving its lifetime and reusability.”


References (1): Grand View Research


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