Mechanical and Thermal Properties of PLLA/PCL Modified Clay Nanocomposites
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Poly(l-lactic acid) (PLLA)/poly(caprolactone) (PCL) and two types of organoclay (OMMT) including a fatty amide and ocatdecylamine montmorillonite (FA-MMT and ODA-MMT) were employed to produce polymer nanocomposites by melt blending. Materials were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), elemental analysis, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Mechanical properties were also investigated for these nanocomposites. The nanocomposites showed increasing mechanical properties and thermal stability. XRD results indicated that the materials formed nanocomposites. SEM morphology showed that increasing content of OMMT reduced the domain size of phase separated particles. TEM outcomes have confirmed the intercalated type of nanocomposite. Additionally, a solution casting process has been used to prepare these nanocomposites and characterized to compare these results with the above process.
KeywordsNanocomposite Clay modification Poly(l-lactic acid) Poly(caprolactone) PLLA/PCL
The authors gratefully acknowledge Prof Dr. Mufeed Jalil Ewadh, Cultural Bureau, Embassy of the Republic of Iraq, Kuala Lumpur, Malaysia and Dr. Esam H. Hewayde, Department of Civil Engineering, College of Engineering, Al-Muthanna University for their helpful discussions and suggestions.