Poly(methyl methacrylate)-coated carbonyl iron particles and their magnetorheological characteristics

2010 ◽  
Vol 59 (7) ◽  
pp. 879-883 ◽  
Author(s):  
Wanquan Jiang ◽  
Hong Zhu ◽  
Chaoyang Guo ◽  
Jianfeng Li ◽  
Qun Xue ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Carbonyl Iron ◽  
Iron Particles ◽  
Poly Methyl Methacrylate

scholarly journals Magnetorheological Response for Magnetic Elastomers Containing Carbonyl Iron Particles Coated with Poly(methyl methacrylate)

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 335
Author(s):  
Daichi Takahashi ◽  
Annadanam Venkata Sesha Sainath ◽  
Junko Ikeda ◽  
Kulisara Budpud ◽  
Tatsuo Kaneko ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Carbonyl Iron ◽  
Density Measurement ◽  
Number Density ◽  
Iron Particles ◽  
Sem Images ◽  
Pmma Layer ◽  
Poly Methyl Methacrylate ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Magnetic Elastomers

The magnetorheological response for magnetic elastomers containing carbonyl iron (CI) particles with a diameter of 6.7 μm coated with poly(methyl methacrylate) (PMMA) was investigated to estimate the diameter of secondary particles from the amplitude of magnetorheological response. Fourier-transformed infrared spectroscopy revealed that the CI particles were coated with PMMA, and the thickness of the PMMA layer was determined to be 71 nm by density measurement. The change in the storage modulus for magnetic elastomers decreased by coating and it was scaled by the number density of CI particles as ΔG~N2.8. The diameter of secondary particle of CI particles coated with PMMA was calculated to be 8.4 μm. SEM images revealed that the CI particles coated with PMMA aggregated in the polyurethane matrix.

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