Mechanical and Thermal Properties of Micro-and Nano-silica-filled Pmma Micro Injection Moldings

Content Provider	Semantic Scholar
Author	Kobayashi, Yuka Leong, Yew Wei Sarata, Makoto Hamada, H. Yokota H. Yamada, Kazushi Kotaki, Masaya Yoshinaga, Kohji Karakawa, Hiroyuki Ito, Hiroshi Kazama, Kunihiko Kikutani, Takeshi
Copyright Year	2007
Abstract	Microand nano-scale silica particles filled poly (methyl methacrylate) (PMMA) composites were prepared using high shear compounding and thin-wall micromolding. Mechanical performances of the composites were elucidated through tensile tests and internal structures of fractured surfaces were obtained from microscopic observations. The incorporation of silica particle has raised the tensile modulus of all specimens irrespective of processing conditions. Distribution of micro-fillers in the molded specimens was preferential towards the end side than the gate and center sides. Nano-filler particles were dispersed uniformly in most parts of the specimen while boundary separations between filler and matrix could be observed at the skin layer in micro silica filled PMMA. Thermo gravimetric analysis (TGA) data suggested anisotropic distribution of micro-silica particles in the specimens. The degradation temperature of the composites increased especially at regions with high concentration of micro-silica particles. The glass transition temperatures (Tg) of filled micro-silica specimens were higher than neat PMMA and nanosilica specimen.
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Alternate Webpage(s)	http://www.iccm-central.org/Proceedings/ICCM16proceedings/contents/pdf/WedA/WeAM1-05ge_kobayashiy224975.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article