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Polystyrene foams with dispersed catalyst for a design of recyclable plastics

Published online by Cambridge University Press:  31 January 2011

Tamaki Hirose ,
Yoshifumi Takai ,
Naoto Azuma ,
Yoshio Morioka ,
Akifumi Ueno  and
Mitsunori Okada
Tamaki Hirose
Affiliation:
Department of Materials Science, Faculty of Engineering, Shizuoka University, Jyohoku, Hamamatsu, Shizuoka 432, Japan
Yoshifumi Takai
Affiliation:
Department of Materials Science, Faculty of Engineering, Shizuoka University, Jyohoku, Hamamatsu, Shizuoka 432, Japan
Naoto Azuma
Affiliation:
Department of Materials Science, Faculty of Engineering, Shizuoka University, Jyohoku, Hamamatsu, Shizuoka 432, Japan
Yoshio Morioka
Affiliation:
Department of Materials Science, Faculty of Engineering, Shizuoka University, Jyohoku, Hamamatsu, Shizuoka 432, Japan
Akifumi Ueno
Affiliation:
Department of Materials Science, Faculty of Engineering, Shizuoka University, Jyohoku, Hamamatsu, Shizuoka 432, Japan
Mitsunori Okada
Affiliation:
Yokohama Institute, Furukawa Electric Co., Okano, Nishi-ku, Yokohama, Kanagawa 220, Japan
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Extract

The present authors have already reported that barium oxide is the most effective catalyst for the conversion of waste polystyrene into styrene including both monomer and dimer. Around 85 wt.% of waste polystyrene was converted into styrene when it was degraded at 623 K in the presence of barium oxide as catalyst. In this paper, the preparation and the thermal degradation of polystyrene films with dispersed catalyst are described for a design of recyclable plastics for better environment. More than 85 wt.% of the films was degraded into styrene at 623 K without addition of other catalytic compounds. Techniques for foaming the films using either nitrogen or carbon dioxide are discussed. It was found that the polystyrene foams with dispersed catalyst are well converted into styrene when they are simply degraded at 673 K.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 1 , January 1998 , pp. 77 - 80
Copyright
Copyright © Materials Research Society 1998

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