5. Chemical processes (solvolysis, glycolysis, acidolysis, etc.)
Chemical recycling is based on the principle of depolymerization by solvolysis. This technique involves treating a polymer or polymer-matrix composite with a reactive solvent capable of depolymerizing the resin by cutting the bonds present in the macromolecular network, leading to a liquid mixture of depolymerization products [2][42]. Depending on the case, glycolysis, acidolysis, hydrolysis or alcoholysis are used to describe the chemical treatment involving glycol, acid, water or alcohol respectively.
The technique has been industrially developed mainly for thermoplastic polymers, notably PET and PVC, for which there are well-mastered industrial processes. The highly stable, cross-linked chemical structure of thermosetting resins makes their depolymerization more delicate, but nonetheless conceivable, particularly in the...
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Chemical processes (solvolysis, glycolysis, acidolysis, etc.)
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