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Influence of microwave power and HDPE blend ratio on thermal and mechanical properties of kenaf reinforced PLLA/HDPE blended composites

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Abstract

Present work attempted to manufacture kenaf/PLLA/HDPE blended composites using a novel technique of microwave-assisted compression molding (MACM). Since the manufacturing of pure PLLA composite is costly as well as its structural instability while manufacturing via MACM. Therefore, blending of HDPE in PLLA was done for structural stability as well as cost reduction purpose. Influence of microwave power and HDPE blend ratio on thermal and mechanical properties of 20 wt.% kenaf/PLLA/HDPE blended composites were investigated. Effect of various microwave power levels (i.e., 180 W, 360 W, and 540 W) and different HDPE blend percentages (i.e., 0%, 10%, 20%, 30%, and 40%) on mechanical properties of PLLA-based composites studied. Composites fabricated at 180 W and 30% HDPE blend exhibited the highest tensile strength. Elongation of composites decreased at higher microwave power due to decreased relaxation time of molecules. Furthermore, the crystallinity of the composites increased with increasing wt.% of the HDPE blend.

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Acknowledgements

First author, Manoj gratefully acknowledges IIT Mandi and MHRD, Government of India, for his Ph.D. work.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Chandigarh University, Mohali, Punjab, India

    Manoj Kumar Singh

  2. Composite Design and Manufacturing Research Group, School of Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India

    Sunny Zafar

  3. Natural Composites Research Group Lab, Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, Thailand

    Sanjay Mavinkere Rangappa & Suchart Siengchin

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  1. Manoj Kumar Singh
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  2. Sunny Zafar
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  3. Sanjay Mavinkere Rangappa
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Correspondence to Manoj Kumar Singh.

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Singh, M.K., Zafar, S., Rangappa, S.M. et al. Influence of microwave power and HDPE blend ratio on thermal and mechanical properties of kenaf reinforced PLLA/HDPE blended composites. J Polym Res 29, 268 (2022). https://doi.org/10.1007/s10965-022-03120-4

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