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Thermal behavior of ungrafted and grafted bagasse and wood pulps
Author(s) -
Kessira L.,
Ricard A.
Publication year - 1993
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.1993.070490911
Subject(s) - pulp (tooth) , bagasse , thermogravimetric analysis , thermal stability , grafting , swelling , differential scanning calorimetry , materials science , kenaf , cellulose , polymer chemistry , monomer , chemical engineering , acrylonitrile , composite material , chemistry , pulp and paper industry , copolymer , polymer , organic chemistry , fiber , medicine , physics , pathology , engineering , thermodynamics
The effect of grafting of methyl methacrylate (MMA) and acrylonitrile (AN) on the thermal behavior of the pulp of sugar cane loaded with CaCO 3 and the pulp of a broad‐leaved tree has been studied by thermal methods. Different experimental conditions of grafting AN onto the eucalyptus pulp have been used, including both water and organic solvent systems as the medium of reaction. To optimize the grafting of MMA onto wood pulp, the effect of pulp swelling and the contact time of the monomer with the pulp have been examined. Ungrafted as well as grafted cellulose samples with different levels of grafting were characterized by differential scanning calorimetry (DSC) and the thermogravimetric analysis (TGA). The CaCO 3 filler makes the pulp of bagasse thermally more stable. The grafting of MMA onto the bagasse or the wood pulps improves their thermal stability. This is not the case for wood grafted with poly(AN). The thermal stability of the grafted and ungrafted samples varies after a few weight percent has been lost. The glass transition temperature ( T g ) of the copolymers have been measured and they are in good agreement with the calculated data. © 1993 John Wiley & Sons, Inc.