Carbohydrate-derived unsaturated POLYESTER (cas 113669-97-9) for high bio-based carbon content photopolymer
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Add time:08/30/2019 Source:sciencedirect.com
This paper focuses on the study of thermomechanical properties of POLYESTER (cas 113669-97-9) acrylate (PEA) resins based on poly(butylene succinate) (PBS) and isosorbide with incorporation of 1/ diacid chains ranging from succinic acid (C4) to azelaic acid (C9) and 2/ diols with various structures such as butanediol and poly(ethyleneglycol) (PEG) with the aim to affect the stiffness of photopolymerized coatings. Therefore, statistic polyester acrylates of Mn 600 g/mol with low polydispersity and Tg were successfully synthetized and characterized by SEC, DSC and DMA. The relative acid value is between 60 and 80 mgKOH/g and the biorenewable carbon content can reach 71 to 90%. Incorporation of the different diols in the backbone was confirmed by NMR. The mixtures of mono and difunctionnal oligomers were crosslinked under LED irradiation and benefits from flexible chain extenders was enlighetened first from improved rate of polymerization and with higher conversion.
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