Results from the analysis of the thiol-Michael addition products For the addition between AMS-maleimide and oligoPBAT-dithiol and before performing the TEA-catalyzed thiol-Michael addition (Figure ), some preliminary syntheses were performed. The goal is to try to avoid the use of catalysts in a frame of sustainability, on agreement with some green chemistry principles, to reduce the potential impact and ecotoxicity of the final compounds . Although thiol-Michael addition is most often catalyzed by a base but it can also be initiated by a nucleophile 20 , different preliminary trials were attempted without catalyst such as: