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2 results on '"Benhong Yang"'

1. Preparation and characterization of bone-like hydroxyapatite/poly(methyl methacrylate) composite biomaterials

Author

Yun Wu, Meng Li, Hui Zhang, Benhong Yang, Jianjiang Huang, and Chonghai Deng

Subjects
poly(methyl mathacrylate), Materials science, Nanocomposite, Composite number, hydroxyapatite, Poly(methyl methacrylate), Characterization (materials science), visual_art, nanocomposites, Materials Chemistry, Ceramics and Composites, visual_art.visual_art_medium, TA401-492, Composite material, Materials of engineering and construction. Mechanics of materials, biomaterials
Abstract

A series of hydroxyapatite (HAp)/poly(methyl mathacrylate) (PMMA) nanocomposites were prepared by free radical copolymerization of surface-modified HAp with methyl mathacrylate (MMA) via a bulk copolymerization process. Fourier transform infrared spectrophotometry and X-ray diffraction were employed to characterize the structures of the HAp/PMMA nanocomposites. Scanning electron microscope images showed that the as-prepared composite films were smooth, and no severe aggregation of HAp was observed when HAp content was 20 wt%) weakened the thermal and mechanical properties of the nanocomposites owing to the phase separation in the composite matrix caused by the strong aggregation of HAp particles.

Published
2013

2. Preparation and characterization of polyhedral oligomeric silsesquioxane/polystyrene nanocomposites.

Author

Benhong Yang, Meng Li, Yun Wu, and Kang Wang

Subjects
EFFECT of temperature on nanocomposite materials, POLYSTYRENE analysis, POLYHEDRAL functions, SILICONES, OLIGOMERIZATION, THERMAL properties
Abstract

Several inorganic/organic nanocomposites were prepared via solution-blending of cage-like octahexyl-polyhedral oligomeric silsesquioxane (Oh-POSS) with polystyrene (PS) in THF solvent. FTIR and 29Si-NMR were employed to characterize the structures of the nanocomposites. SEM pictures showed that the sample films were smooth and no POSS aggregation was observed when POSS content was lower than 1.0 wt%. TGA and DSC were used to investigate the thermal property. The results showed that the incorporation of nanosized Oh-POSS enhanced the thermal stability of PS with low POSS content. When 1.0 wt% of Oh-POSS was incorporated into PS matrix, the Tg and Td increased by 7.7 °C and 8.2 °C, respectively. However, higher POSS contents (>1.0 wt%) would deteriorate the thermal property of the nanocomposites due to the severe congregation of POSS.. [ABSTRACT FROM AUTHOR]

Published
2012

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