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Mechanical properties and flame retardancy of surface modified magnesium oxysulfate(5Mg(OH)_(2)·MgSO_(4)·3H_(2)O)whisker for polypropylene composites

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Journal of Materiomics 2018年第2期4卷 149-156页

作者： 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 School of Chemical Engineering Department of Polymer Science and EngineeringSungkyunkwan UniversitySuwon16410Republic of Korea Department of Mechanical Engineering University of NevadaLas Vegas4505 S.Maryland ParkwayLas VegasNV89154United States Department of Energy Science Sungkyunkwan UniversitySuwon16410Republic of Korea Perceived Materials Research Team Hyundai Motor Group18280HwaseongRepublic of Korea Korea Institute of Science and Technology Seoul02792Republic of Korea Korea Automotive Technology Institute Cheonan31214Republic of Korea

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 *** 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 *** 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 *** 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℃and 14 wt%in 350-420℃in two *** 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.

关键词： magnesium oxysulfate Surface modification Mechanical properties Flame retardant

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Synthesis and characterization of MgSO_4·5Mg(OH)_2·2H_2O flake powders

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Journal of Central South University 2011年第6期18卷 1871-1876页

作者：符剑刚梁威王晖何章兴 School of Chemistry and Chemical Engineering Central South University

magnesium oxysulfate （MgSO4·5Mg（OH）2·2H2O） flake powders with an average diameter of 2 ~tm and a thickness of 0.052 μm were prepared using magnesium sulfate and sodium hydroxide as raw materials by hydrothermal synthesis process. The composition, morphology and structural features of the hydrothermal products were examined with X-ray powder diffraction （XRD）, scanning electron microscopy （SEM） and Fourier transform infrared spectroscopy （FTIR）. The experimental results indicate that in the conditions of n（NaOH）/n（MgSO4） of 1.25, the dosage of w（Na3PO4） crystal additives of 1.0% w（MgSO4）, stirring for 5 h at 180 ℃, the morphology of MgSO4·5Mg（OH）2·2H2O products is flaky and laminar, which is a kind of complex magnesium singlecrystal. The recycling of MgSO4 mother liquor was also investigated to make a full use of the materials and reduce disposal. The results prove that there is no adverse effect on the yield and purity of the products.

关键词： hydrothermal synthesis magnesium oxysulfate flake powders crystal additives

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