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Surface properties of carbons from poly(vinyl chloride)
Author(s) -
Youssef A. M.,
AbdelBary E. M.,
Dowidar A. M.
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990280407
Subject(s) - vinyl chloride , activated carbon , materials science , carbon dioxide , oxygen , adsorption , carbon fibers , degradation (telecommunications) , chemical engineering , thermal treatment , polyvinyl chloride , chemistry , composite material , organic chemistry , polymer , composite number , copolymer , telecommunications , computer science , engineering
Non‐activated carbons were prepared by the thermal degradation of poly(vinyl chloride) (PVC) in air or nitrogen atmosphere in the temperature range 600‐1000°C. Carbon dioxide‐activated carbons from PVC were also obtained by gasification of non‐activated carbon from PVC at 900°C burn‐off (4‐50%). Thermal degradation in air atmosphere gave high carbon yield because the oxygen of air increased crosslinking at lower temperature and chemisorbed on the carbon surface at high temperatures. Thermal degradation in air and gasification with carbon dioxide created carbon‐oxygen surface groups which increased the hydrophilicity of the carbon surface and consequently increased water adsorption capacity. Gasification with carbon dioxide to high burn‐off created new pores and widened already existing pores.