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http://nopr.niscpr.res.in/handle/123456789/33092| Title: | Kinetics of Acetylation of Cellulose with Mono-, Di- and Tri-bromoacetic Acids and Thermo-analytical Studies of the Products |
| Authors: | Bhatnagar, Satish Agnish, S L Bhatnagar, Hari L |
| Issue Date: | Mar-1982 |
| Publisher: | NISCAIR-CSIR, India |
| 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. |
| Page(s): | 13-18 |
| ISSN: | 0975-1025 (Online); 0971-0426 (Print) |
| Appears in Collections: | IJFTR Vol.07(1) [March 1982] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJFTR 7(1) 13-18.pdf | 2.26 MB | Adobe PDF | View/Open |
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