Aromatic/Aliphatic Polyester Blends

Autor(es)

Quental, A. C. ^[1] ; de Carvalho, F. P. ^[1] ; Rezende, M. L. ^[2] ; Rosa, D. S. ^[2] ; Felisberti, M. I. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Inst Quim, BR-13083900 Campinas, SP - Brazil

^[2] Univ Sao Francisco, Programa Pos Grad Engn & Ciencias Mat, BR-13251900 Itatiba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 18, n. 3, p. 308-317, SEP 2010.
• Citações Web of Science: 0

Resumo

Blends of poly(3-hydroxybutyrate) (PHB) and poly(ethylene terephthalate-co-1,4-cyclohexenedimethanol terephthalate) (PETG) were prepared in a batch mixer and in a twin screw extruder and characterized by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), field emission scanning electron microscopy (FE SEM), flexural tests, biodegradation tests in soil compost and in an enzymatic medium. The torque data showed that the addition of PETG to PHB improved its processability. DSC, DMA and FE SEM showed that the polymers are immiscible with morphology dependent on the processing conditions. A fine dispersion of PETG in the PHB matrix was observed for extruded and injection molded blends. Flexural modulus for blends was higher for blends in comparison with PHB, while the impact resistance of blends containing 20 wt% and 30 wt% of PETG is comparable to the value for PHB. PHB is biodegradable, while PETG did not degrade either in simulated soil or in the alpha-amylase medium. On the other hand, the PHB phase of the blends degrades under these aging conditions. Thus, the addition of PETG to PHB results in advantage such as improving of processability and Young's modulus without significant changes in the impact resistance while keeping the biodegradability of PHB. (AU)

• Processo FAPESP: 04/15084-6 - Materiais poliméricos de baixo impacto ambiental
• Beneficiário: Marco-Aurelio de Paoli
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 03/09926-1 - Materiais poliméricos e cerâmicos
• Beneficiário: Inez Valeria Pagotto Yoshida
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático
• Processo FAPESP: 01/07841-3 - Blenda de poli(3-hidroxibutirato) e EPDM funcionalizado com anidrido maleico
• Beneficiário: Fabiana Pires de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 00/10063-0 - Blendas de poli (3-hidroxibutirato) e poli (tereftalato de etileno) PHB/PET
• Beneficiário: Antonio Carlos Quental
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 04/13723-1 - Poli(metacrilato de metila) de alto impacto: síntese a partir de polimerização de metacrilato de metila em presença de AES e preparação e caracterização de suas blendas com PPO
• Beneficiário: Fabiana Pires de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto