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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Properties of a Biodegradable Ternary Blend of Thermoplastic Starch (TPS), Poly(epsilon-Caprolactone) (PCL) and Poly(Lactic Acid) (PLA)

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Autor(es):
Carmona, Vitor Brait [1, 2] ; Correa, Ana Carolina [1] ; Marconcini, Jose Manoel [1] ; Capparelli Mattoso, Luis Henrique [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Embrapa Instrumentat, Natl Lab Nanotechnol Agribusiness LNNA, BR-13560970 Sao Carlos, SP - Brazil
[2] Fed Univ Sao Carlos UFSCar, Grad Program Mat Sci & Engn PPG CEM, Sao Carlos, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 23, n. 1, p. 83-89, MAR 2015.
Citações Web of Science: 28
Resumo

Biodegradable ternary blends of thermoplastic starch (TPS), poly(epsilon-caprolactone) (PCL) and poly(lactic acid) (PLA) were prepared by one-step extrusion based on the complementary mechanical properties between both ductile PCL and rigid PLA and also low cost TPS. TPS/PCL/PLA blend was prepared using equal mass fraction of each component and presented as an incompatible material. We then evaluated the addition of citric acid, maleic anhydride and methylene diphenyl diisocyanate (MDI) as compatibilizing agents in the ternary blend. They did not significantly affect thermal stabilities of the ternary blends but induced PCL and PLA crystallization. Adding 2 wt% of MDI caused an increase in melt viscosity of the ternary blend suggesting that urethane linkages were formed with TPS and it also was efficient in order to obtain notable improvements in tensile strength and ductility of the ternary blend. (AU)

Processo FAPESP: 08/08264-9 - Estudos de degradação de polímeros biodegradáveis por luz, calor e microrganismos de solo compostado
Beneficiário:Adriana de Campos Pastre
Linha de fomento: Bolsas no Brasil - Pós-Doutorado