Effect of coupling agent content on properties of composites made from polylactic acid and chrysanthemum waste

Seong Chun Koay, Ming Yeng Chan, Pui May Chou, Kim Yeow Tshai, Ong Thai Kiat, Kean How Cheah

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Chrysanthemum flower is among one of the highly sought after and widely planted flower crops, in particular for cultural and religious ceremonies. However, the chrysanthemum stem and stalk have little value and usually discard as by-product waste from floristry. The objective of this research is to investigate the potential value of utilizing chrysanthemum stem and stalk as reinforcing fillers for thermoplastic composites. In this study, 2-mm thick composite sheet containing predefined formulations of polylactic acid (PLA), chrysanthemum waste filler (CWF) ranging from 15 to 60 phr, and maleated polyethylene (MAPE) coupling agent up to 5 phr were prepared with the aid of Haake internal mixer and compression molding. The effect of MAPE loading on tensile, thermal, and morphological properties of PLA/CWF composites was investigated. The findings revealed that PLA/CWF composite attained improved tensile modulus compared to the neat PLA, and the tensile modulus increases with higher concentration of CWF. However, both tensile strength and elongation at break reduces with increase loading of CWF. Overall, PLA/CWF composites with MAPE shows better performance compared to those without MAPE, where an optimum strength of 21.8 MPa can be achieved with 60 phr CW and 3 phr MAPE. The measured tensile strength is comparable to alternatives natural fiber thermoplastic composites demonstrating its potential to be used in non-structurally demanding application. 

Original languageEnglish
Pages (from-to)10-16
Number of pages7
JournalJournal of Vinyl and Additive Technology
Volume26
Issue number1
Early online date21 May 2019
DOIs
Publication statusPublished - Feb 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Polymers and Plastics
  • Marketing
  • Materials Chemistry

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