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Effects of recycling on mechanical and thermal properties of polystyrene
Author(s) -
Djidjelli H.,
Benachour D.
Publication year - 1998
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19981270124
Subject(s) - polystyrene , materials science , thermal , composite material , expanded polystyrene , polymer , thermodynamics , physics
A commercial Polystyrene (M w = 2.5 10 5 , MFI =14.80) was extruded repeatedly from one to eight times at 190 °C. The effects of extrusion process on physical and chemical properties of polystyrene were investigated using: ‐Average molecular weight—Izod Impact strength; —Thermal properties (TGA, DTA).The results showed that processing of polystyrene leads to degradation. In fact, a decrease of 23% in the average molecular weight was observed for the 8 th cycle sample and a reduction in impact strength by 34% was also noticed for the 4 th cycle sample.