Polímeros: Ciência e Tecnologia
https://revistapolimeros.org.br/article/doi/10.1590/0104-1428.1586
Polímeros: Ciência e Tecnologia
Scientific & Technical Article

Estudo da miscibilidade das misturas de PHB e PLA, com um PHB de alta polidispersividade

Miscibility study of PHB and PLA mixtures, using a PHB with high polydispersity

Pachekoski, Wagner M.; Dalmolin, Carla; Agnelli, José Augusto M.

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Resumo

Neste trabalho, foi estudada a miscibilidade de misturas de um PHB constituído de frações de alta e baixa massa molar com um PLA de alta massa molar. Os materiais extrudados foram analisados pelas técnicas de calorimetria exploratória diferencial (DSC), espectroscopia dielétrica (DE) e análises dinâmico-mecânicas (DMA). A partir dos resultados observou-se o distinto comportamento cristalino das frações de PHB, assim como a miscibilidade parcial do PLA com o PHB de baixa massa molar.

Palavras-chave

PHB, PLA, misturas poliméricas, polímero biodegradável.

Abstract

In this work, the miscibility of a PHB formed by high and low molar mass fractions and a low molar mass PLA was studied. The extruded materials were analyzed by differential scanning calorimetry (DSC), dielectric spectroscopy (DS) and dynamic mechanical analysis (DMA). From these results, it was observed an unique behavior from the PHB fractions, and the partial miscibility of PLA onto low molar mass PHB.

Keywords

PHB, PLA, blends, biodegradable polymer.

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