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|Title:||Kinetics of Acetylation of Cellulose with Mono-, Di- and Tri-bromoacetic Acids and Thermo-analytical Studies of the Products|
Agnish, S L
Bhatnagar, Hari L
|Abstract:||The bromoacetylation of cellulose with mono-, di- and tri-bromoacetic acids has been studied kinetically in the temperature range 303.16-353.16 K. The energies of activation for the reactions of mono-, di- and tri-bromoacetic acids with cellulose have been found to be 18.94, 21.15 and 26.79 kJ mol-1 respectively. The treated samples were subjected to DTA and TGA studies. The values of heats of decomposition for these samples increase from 0.36 to 1.04 kJ/g with increase in the concentration of bromine from 0.38 to 3.13 %. From the average percentage char yield of the treated samples and other temperature - dependent parameters, like the entropy and the free energy of activation for the pyrolytic degradation of the modified cellulose samples obtained by TGA, the flame-retarding abilities of mono-, di- and tri-bromoacetylated celluloses have been evaluated.|
|ISSN:||0975-1025 (Online); 0971-0426 (Print)|
|Appears in Collections:||IJFTR Vol.07(1) [March 1982]|
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