EFFECT OF DIFFERENT CATALYSTS ON SYNTHESIS OF BIO-BASED POLY(PROPYLENE MALONATE)
Abstract
Driven by both environmental concerns and economic considerations, the demand for biomass-derived monomers in polymer development has significantly increased in recent years. Bio-based plastics, in particular, have emerged as a leading focus area and have consistently ranked among the top priorities in discussions of breakthrough technologies for advancing a circular economy. In this study, one of the goals is to assess the effectiveness of various esterification catalysts. For this purpose, different bio-based homopolyesters using 1,3-propanediol and malonic acid as raw materials and six catalysts (titanium (IV) butoxide (TBT), titanium (IV) isopropoxide (TTIP), tin (II) 2-ethylhexanoate (stannous octoate, Sn(Oct)2), antimony (III) oxide (Sb2O3), stannous chloride dehydrate (SnCl2.2H2O) and aluminum chloride (AlCl3)) were synthesized. The synthesized polymers were chemically characterized by NMR and FTIR. The thermal properties were investigated by DSC and TGA. The FTIR results confirmed that the homopolyesters were successfully synthesized, and a Tg of approximately -48 °C was detected by DSC. The maximum working temperatures, where loss of 50 wt % occurs, were around 365 °C.
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References
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