Document Type

Article

Publication Date

4-17-2024

Abstract

Polyester synthetics are widely used in clothing, but creating environmentally friendly materials from renewable resources is essential to reduce our reliance on non-renewable resources such as petroleum products. Azelaic acid, pimelic, and glutaric acid are natural dicarboxylic acids that can be used for the synthesis of bio-based polyesters. This research focuses on synthesizing saturated linear polyesters using azelaic acid, pimelic acid, and glutaric acid with diols of different carbon chain lengths. The process consists of a two-step polymerization process, which uses stannous octoate as a catalyst and hydroquinone as a radical inhibitor. Optimization of the polymerization conditions, including the catalyst amount, second-stage reaction temperature, and time, to achieve a high molecular mass in the longer chain was performed. 1H NMR was used to analyze the chemical structures of the obtained polyesters. Differential scanning calorimetry (DSC) was used to explore their physical properties, including the effect of dicarboxylate chain length and long-short diol on crystalline structure and thermo-mechanical properties. Increasing the dicarboxylic acid chain length, except for glutaric acid, increased the melting point. The glutaric acid–butane diol film was the most flexible compared to the other polyesters, reflecting good load capacity even after remolding. Overall, this research shows that it is possible to synthesize polyesters with good thermomechanical properties and film flexibility using renewable and environmentally friendly materials. These materials show promise for practical applications.

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