Study of Thermo-Mechanical and Morphological Behaviour of Biodegradable PLA/PBAT/Layered Silicate Blend Nanocomposites

Poly (lactic acid) (PLA) and poly (butylene adipate-co-terephthalate) (PBAT) blend nanocomposites were prepared using melt blending technique followed by compression moulding. The blend nanocomposites were prepared with a variation of PBAT loading along with maleic anhydride and benzoyl peroxide ran...

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Bibliographic Details
Published in:Journal of polymers and the environment 2014-09, Vol.22 (3), p.398-408
Main Authors: Mohapatra, Aswini Kumar, Mohanty, Smita, Nayak, S. K.
Format: Article
Language:English
Subjects:
Applied sciences
Biodegradable materials
Biodegradation
Calorimetry
Chemistry
Chemistry and Materials Science
Composites
Environmental Chemistry
Environmental Engineering/Biotechnology
Exact sciences and technology
Forms of application and semi-finished materials
Industrial Chemistry/Chemical Engineering
Materials Science
Mechanical properties
Morphology
Nanocomposites
Original Paper
Polylactic acid
Polymer industry, paints, wood
Polymer Sciences
Technology of polymers
Thermal properties
X-ray diffraction
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Summary:Poly (lactic acid) (PLA) and poly (butylene adipate-co-terephthalate) (PBAT) blend nanocomposites were prepared using melt blending technique followed by compression moulding. The blend nanocomposites were prepared with a variation of PBAT loading along with maleic anhydride and benzoyl peroxide ranging from 5 to 20 wt% along with two different commercially available nanoclays cloisite 93A and cloisite 30B (C30B) at 3 wt% loading. The maleic anhydride and benzoyl peroxide were used during the melt blending of the blend nanocomposites as a compatibilizer and as an accelerator respectively. Maleic anhydride used to enhance the compatibility of the PLA/PBAT blend and as well as the uniform adhesion of the nanoclays with them. The properties and characterizations of PLA matrix and the PLA/PBAT blend nanocomposites have been studied. The tensile strength, % elongation and impact strength increased with the preparation of PLA/PBAT blend nanocomposites as compared with PLA matrix. PLA/PBAT/C30B blend nanocomposites exhibited optimum tensile strength at 15 wt% of PBAT loading. Differential scanning calorimetry and thermogravimetric analysis also showed improved thermal properties as compared with virgin PLA. The wide angle X-ray diffraction studies indicated an increase in d-spacing in PLA/PBAT/C30B blend nanocomposite thus revealing intercalated morphology.
ISSN:1566-2543
1572-8919
1572-8900
DOI:10.1007/s10924-014-0639-x