2,5-furandicarboxylic Acid - Springer Nature

Synthesis and characterization of 2,5-furandicarboxylic acid poly(butanediol sebacate-butanediol) terephthalate (PBSeT) segment copolyesters with excellent water vapor barrier and good mechanical properties

When the 2,5-furandicarboxylic acid content was in the range from 2 to 10% of terephthalic acid content, the copolyesters had a weight-average molecular weight of over 61,000 g/mol or intrinsic viscosity greater than 1. 1 dL/g. Naturally, the addition of 2,5-furandicarboxylic acid did not have a large effect on polyesters' glass transition temperature and thermal stability. When the addition of 2,5-furandicarboxylic acid was 10%, the water vapor barrier of copolyester reached its highest level, which was increased by 89% compared to PBAT.

Source link: https://doi.org/10.1007/s10853-022-07269-7

Synthesis of a fire-retardant and high T_g biobased polyester from 2,5-furandicarboxylic acid

PECBFs increased to 95 % at 95 °C when BDBE content reached 25%. The samples self-extinguished immediately when BDBE content was more than 15%. A biobased diol is synthesized from vanillin, aiacol, and 9,10-dihydro-9-oxide to produce a series of fire-retardant polyesters by melt polymerization with ethylene glycol, 1,4-cyclohexanedimethanol, and 2,5-furandolylic acid. The BDBE units contribute positively to the high glass transition temperature and fire retardancy, according to the study, while the CHDM moiety provides flexibility and chain propagation capabilities. PECBFs rises from 82 to 95 percent, while the limiting oxygen index increases from 22. 4 to 27. 5% as the number of BDBE rises from 82 to 25. When BDBE units are greater than 15% in the UL-94 combustion test, the samples almost self-extinguish immediately after the fire is smuish, as the samples are moved away.

Source link: https://doi.org/10.1038/s41428-022-00642-y

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