کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5205144 | 1381987 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of methylcellulose produced from sugar cane bagasse cellulose: Crystallinity and thermal properties Characterization of methylcellulose produced from sugar cane bagasse cellulose: Crystallinity and thermal properties](/preview/png/5205144.png)
In the present work, methylcellulose produced from sugar cane bagasse was characterized by FTIR, WAXD, DTA and TGA techniques. Two samples were synthesized: methylcellulose A and methylcellulose B. The only difference in the process was the addition of fresh reactants during the preparation of methylcellulose B. The ratio between the absorption intensities of the C-H stretching band at around 2900Â cmâ1 and O-H stretching at around 3400Â cmâ1 for methylcellulose B is higher than for methylcellulose A, indicating that methylcellulose B showed an increase in the degree of substitution (DS). Methylcellulose A presents a more heterogeneous structure, which is similar to the original cellulose as seen through FTIR and DTA. Methylcellulose B showed thermal properties similar to commercial methylcellulose. The modification of methylcellulose preparation method allows the production of a material with higher DS, crystallinity and thermal stability in relation to the original cellulose and to methylcellulose A.
Journal: Polymer Degradation and Stability - Volume 92, Issue 2, February 2007, Pages 205-210