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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Carmona, Vitor Brait [1, 2] ; Correa, Ana Carolina [1] ; Marconcini, Jose Manoel [1] ; Capparelli Mattoso, Luis Henrique [1]
Total Authors: 4
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 23, n. 1, p. 83-89, MAR 2015.
Web of Science Citations: 28
Abstract

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)

FAPESP's process: 08/08264-9 - Study of the degradation of biodegradable polymers by light, heat and microorganisms in composted soil
Grantee:Adriana de Campos Pastre
Support type: Scholarships in Brazil - Post-Doctorate