Mechanical properties and flame retardancy of surface modified magnesium oxysulfate (5Mg(OH)2·MgSO4·3H2O) whisker for polypropylene composites

Eui Su Kim, Ye Chan Kim, Jungwoo Park, Youngjun Kim, Sung Hoon Kim, Kwang Jin Kim, Jonghwan Suhr, Youngkwan Lee, Seong Hoon Lee, Dae Sik Kim, Soo Hyun Kim, Ju Ho Yun, In Kyung Park, Jae Do Nam

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Magnesium oxysulfate (MOS) whisker is considered as a promising inorganic material recently attracting a great attention for being used as a reinforcing filler for polymer composites due to high aspect ratio and extremely-low bulk density. In this study, the MOS was treated with 3-methacryloyloxypropyl-trimethoxy silane (MPS) via sol-gel condensation reactions, which successfully allowed melt mixing with polypropylene (PP) up to 30 wt% of MOS. The tensile strength at yield and modulus of the MOS/PP composites were substantially increased by 50.8% and 362%, respectively, when compared with the pristine PP. As a novel finding, the flame retardancy of MOS was proved by identifying water evolution at elevated temperatures giving out 9 wt% of water in 250–320 °C and 14 wt% in 350–420 °C in two steps. This work demonstrated that the MOS could be an excellent filler for PP not only increasing the mechanical properties in a great extent but also imposing flame retarding capability.

Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalJournal of Materiomics
Volume4
Issue number2
DOIs
Publication statusPublished - 2018 Jun

Keywords

  • Flame retardant
  • Magnesium oxysulfate
  • Mechanical properties
  • Surface modification

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Metals and Alloys

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  • Cite this

    Kim, E. S., Kim, Y. C., Park, J., Kim, Y., Kim, S. H., Kim, K. J., Suhr, J., Lee, Y., Lee, S. H., Kim, D. S., Kim, S. H., Yun, J. H., Park, I. K., & Nam, J. D. (2018). Mechanical properties and flame retardancy of surface modified magnesium oxysulfate (5Mg(OH)2·MgSO4·3H2O) whisker for polypropylene composites. Journal of Materiomics, 4(2), 149-156. https://doi.org/10.1016/j.jmat.2018.02.003