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Pyrolytic Reaction of Carbohydrates. Part IX the Effect of Additives on the Thermal Behavior of Cellulose Samples of Different Crystallinity
Author(s) -
Patai S.,
Halpern Y.
Publication year - 1970
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197000079
Subject(s) - crystallinity , chemistry , cellulose , levoglucosan , pyrolytic carbon , degree of polymerization , decomposition , filter paper , thermal decomposition , polymerization , chemical engineering , nuclear chemistry , polymer chemistry , organic chemistry , pyrolysis , polymer , chromatography , crystallography , aerosol , biomass burning , engineering
The thermal decomposition of four different cellulose samples (untreated cellulose, powdered or ball‐milled Whatman 544 filter paper, and micro‐crystalline cellulose) was studied at 250°. In samples heated either alone or in the presence of NaHSO 4 , Na 2 SO 4 , Na 3 PO 4 , or NaCl for 2 or 4 hr, weight loss, total organic volatiles, levoglucosan, water, acids, average degree of polymerization, and crystallinity index were determined. The results obtained are tabulated and compared. Whereas pretreatment and crystallinity considerably affect the pyrolytic behavior of the different samples, the presence of additives tends to mask the observable differences.