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Controlled degradation of polystyrene
Author(s) -
Ide Syoaki,
Ogawa Taichi,
Kuroki Takeshi,
Ikemura Tadashi
Publication year - 1984
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1984.070290812
Subject(s) - polystyrene , oligomer , styrene , degradation (telecommunications) , catalysis , materials science , chemical engineering , polymer chemistry , atmospheric temperature range , copolymer , chemistry , polymer , organic chemistry , composite material , thermodynamics , telecommunications , physics , computer science , engineering
For the purpose of efficient utilization of waste polystyrene, the recovery method of a styrene oligomer having a molecular weight of 1000–3000 was studied. Thermal and catalytic degradations were carried out. It was impossible to obtain a styrene oligomer with a molecular weight less than 5000 by thermal degradation in the temperature range of 300–500°C. Catalytic degradation in the presence of silica–alumina catalyst in the temperature range of 190–230°C made it possible to control the decrease in molecular weight and to obtain a styrene oligomer having a molecular weight of 500–3000. Simultaneously, the molecular structures of the reaction products from thermal and catalytic degradations were determined by NMR analysis.