Journal
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING
Volume 54, Issue 4, Pages 350-356Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/03602559.2014.935422
Keywords
Biodegradable polymers; Injection molding; Morphology study; Polymer blends and alloys; Thermal properties
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Funding
- Portuguese Science and Technology Foundation (FCT) [MIT-Pt/EDAM-SMS/0030/2008, SFRH/BD/42978/2008]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/42978/2008, COVID/BD/151577/2021, MIT-Pt/EDAM-SMS/0030/2008] Funding Source: FCT
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In this work we present the thermal characterization of the full scope of polyhydroxyalcanoate and poly(lactic acid) blends obtain by injection molding. Blends of polyhydroxyalcanoate and poly(lactic acid) (PHA/PLA) were prepared in different compositions ranging from 0-100% in steps of 10%. The blends were injection molded and then characterized by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and wide angle X-ray diffraction (WAXD). The increment of PHA fraction increased the degree of crystallinity of the blend and the miscibility of the base polymers as verified by the Fox model. The WAXD analysis indicates that the presence of PHA hindered the PLA crystallization. The crystallization evolution trough PHA weight fraction (wf) shows a phase inversion around 50-60%. SEM analyses confirmed that the miscibility of PHA/PLA blends increased with the incorporation of PHA and became total for values of PHA higher that 50%.
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