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INVESTIGATION ON THE MORPHOLOGICAL AND THERMAL PROPERTIES OF POLYLACTIC ACID/POLYCAPROLACTONE LOADED WITH HALLOYSITE NANOTUBES AND BASALT FIBER

A. Arul Jeya Kumar, Niranjan S. Raj, C. Saiprasad and Aghalayam R. Sudhanva
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A. Arul Jeya Kumar: Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India
Niranjan S. Raj: Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India
C. Saiprasad: Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India
Aghalayam R. Sudhanva: Department of Mechanical Engineering, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram 603203, Tamil Nadu, India

Surface Review and Letters (SRL), 2022, vol. 29, issue 03, 1-10

Abstract: This paper is focused on the analysis of the morphological and thermal properties of the biomedical composites, polylactic acid (PLA) and polycaprolactone (PCL) matrix, reinforced with basalt fibers (BFs) and using halloysite nanotubes (HNT) as filler material. Four different composites, viz. PPHB 1, PPHB 2, PPHB 3 and PPHB 4, are obtained by varying the weight fractions of these materials using twin-screw extrusion followed by injection molding. The morphological characterization is performed on these composites using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. SEM reveals homogenous and strong bonding between the matrix, reinforcement and filler. The BF are well embedded in the matrix with a random orientation. No formation of voids and cracks is observed. The functional groups present and the types of vibration experienced by the chemical bonds were observed in the FTIR spectra. The composites are subjected to thermal testing such as differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The PPHB 2, which contains 80% PLA, 10% BF, 7% PCL and 3% HNT, has the highest degree of crystallinity, as revealed by DSC, and exhibits the most optimum thermal degradation characteristics as indicated by TGA.

Keywords: Polylactic acid; polycaprolactone; basalt; halloysite nanotubes; polymer composites; thermal properties; morphology (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22500378

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