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Sustainable Design of Poly(trimethylene succinate- co -terephthalate) Copolyesters: Melt Memory Effects, Accelerated Crystallization, and Enhanced Mechanical Properties
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Researchers synthesised a series of biobased biodegradable poly(trimethylene succinate-co-terephthalate) (PTST) copolyesters using 1,3-propanediol as an eco-friendly monomer alternative to conventional 1,4-butanediol, investigating their nonisothermal crystallisation kinetics, self-nucleation behaviour, and mechanical properties via Jeziorny, Ozawa, and Mo model analysis. They identified a melt memory self-nucleation effect enabling accelerated crystallisation and enhanced mechanical performance as a sustainable alternative to fossil-based polymers that contribute to microplastic pollution.
The depletion of fossil resources and escalating microplastic pollution necessitate sustainable polymer alternatives. This study develops biobased biodegradable polyesters using 1,3-propanediol (PDO) as an ecofriendly substitute for industrialized 1,4-butanediol (BDO)-based polyesters. A series of poly(trimethylene succinate-co-terephthalate) (PTST) copolyesters with varied succinic acid contents were synthesized to investigate their nonisothermal crystallization kinetics, self-nucleation behavior, and mechanical properties. Crystallization kinetics analyzed via the Jeziorny, Ozawa, and Mo models revealed composition-dependent crystallization rates, growth morphology, and activation energies. Differential scanning calorimetry identified a melt memory effect in PTST, with a self-nucleation temperature interval (147–158 °C) narrower than PBAT’s (141–162 °C), suggesting chain flexibility governs this phenomenon. Postprocessing within this interval enhanced recrystallization, improving mechanical properties without costly and time-consuming annealing. Rotational rheology further confirmed accelerated crystallization during melt cooling within the self-nucleation interval. This work provides a cost-effective strategy to optimize the PTST performance while advancing sustainable material design.
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Sustainable Designof Poly(trimethylene succinate-co-terephthalate)Copolyesters: Melt Memory Effects, AcceleratedCrystallization, and Enhanced Mechanical Properties
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Researchers synthesised biobased biodegradable poly(trimethylene succinate-co-terephthalate) (PTST) copolyesters using 1,3-propanediol as an eco-friendly monomer substitute for industrialised 1,4-butanediol, investigating crystallisation kinetics, self-nucleation behaviour, and mechanical properties across a range of succinic acid compositions. They identified a melt memory self-nucleation effect that enables cost-effective accelerated crystallisation and improved mechanical performance, offering a sustainable polymer alternative addressing both fossil resource depletion and microplastic pollution.
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