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Influence of surface modified cellulose microfibrils on the improved mechanical properties of poly (lactic acid)
Atul P Johari1, S K Kurmvanshi1, S Mohanty1
1Laboratory for Advanced Research in Polymeric Materials (LARPM), CIPET, B-25, C.N.I. Complex, Patia, Bhubaneswar 751 024, India.
Abstract:
Cellulose microfibrils (CMF) were extracted from sisal fiber and characterized. Biocomposites of PLA reinforced with CMF were fabricated employing melt blending technique followed by injection moulding. The biocomposites were subjected to various characterization studies to investigate the effect of CMF within the PLA matrix. Differential scanning calorimetry (DSC) measurements confirmed that the addition of CMF accelerates the crystallization process of PLA matrix. Addition of 5 wt.% of CMF with and without compatibilizers and plasticizers such as maleic anhydride, polyethylene glycol and acetyltributyl citrate in PLA improved the crystallization of PLA up to 100 °C. MA grafting gave moderate effects on both the stiffness and ductility, exhibiting optimum properties.
