Effect of Chain Expansion Modified PBAT on PBAT/TPS/OMMT Composites under Chaotic Field

SHE Han-wen, ZHONG Jing-jun, GUO Wen-shuai, ZHU Jin-ping, LIU Yang-sen, XU Bai-ping, TAN Ling-cao

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (08) : 1-6. DOI: 10.15925/j.cnki.issn1005-3360.2024.08.001
Theory and Research

Effect of Chain Expansion Modified PBAT on PBAT/TPS/OMMT Composites under Chaotic Field

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Abstract

Polybutylene adipate-terephthalate/thermoplastic starch/organic montmorillonite (PBAT/TPS/OMMT) biodegradable materials have attracted wide attention in recent years. However, the conventional twin-screw processing technique leads to material degradation and makes it difficult to achieve good stripping of OMMT. In order to improve its mechanical properties, PBAT was chain expansion modified by ADR-4468, and PBAT/TPS/OMMT containing different contents of modified PBAT (A-PBAT) were prepared by melt extrusion using a perturbation ring dual-speed twin-screw extruder, and the effects of different contents of A-PBAT on the microstructure, rheological properties, compatibility, water absorption and mechanical properties of the composites were analyzed. The results showed that the chain extender effectively improved the mechanical properties of PBAT, and the dual-speed twin-screw could strip OMMT well and make TPS uniformly dispersed and distributed in PBAT. With the increase of A-PBAT content, TPS transforms from continuous phase to dispersed phase, the water absorption of the composite material gradually decreases, and the tensile strength gradually increases, reaching its maximum at a mass fraction of 60% A-PBAT, with a slight decrease in elongation at break. 20% A-PBAT can effectively improve the compatibility between TPS and PBAT.

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Thermoplastic starch / Polybutylene adipate-terephthalate / Co-rotating dual-speed twin-screw / Chaos mixing

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SHE Han-wen , ZHONG Jing-jun , GUO Wen-shuai , et al . Effect of Chain Expansion Modified PBAT on PBAT/TPS/OMMT Composites under Chaotic Field. Plastics Science and Technology. 2024, 52(08): 1-6 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.08.001

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