Mechanical properties and flame retardancy of surface modified magnesium oxysulfate (5Mg(OH)2*MgSO4*3H2O) whisker for polypropylene composites
- Mechanical properties and flame retardancy of surface modified magnesium oxysulfate (5Mg(OH)2*MgSO4*3H2O) whisker for polypropylene composites
- 김수현; 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; Ju-Ho Yun; In-Kyung Park; Jae-Do Nam
- Issue Date
- Journal of Materiomics
- VOL 4, NO 2-156
- 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.
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