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| Titel: |
Molecular Structure and Electrical Insulating Properties of Grafted and Cyanoethylated Cellulose |
| Auteur: |
Nada, A. M. A. Dawy, M. Shabaka, A. A. |
| Verschenen in: |
International journal of polymeric materials |
| Paginering: | Jaargang 47 (2000) nr. 2-3 pagina's 195-206 |
| Jaar: |
2000-09-01 |
| Inhoud: |
Cyanoethylation of cellulose and Grafting of cellulose (bleached viscose wood pulp (VWP)} & cyanoethyl cellulose are carried out. The nitrogen content of these cellulose derivatives is determined. Grafted cyanoethyl cellulose has the highest nitrogen content (12.5%). FT/IR spectra of these derivatives showed a new band at 2225cm-1 in the spectra of cyanoethyl and grafted cellulose which is the characteristic band for -C ═ N stretching vibration. Also, a new band appeared at 1720cm-1 in case of grafted cyanoethyl cellulose, which is the characteristic band for C ═ O stretching vibration. The crystallinity index (A 1435/A 900 cm-1) of cyanoethyl cellulose is lower than that in case of cellulose and grafted cellulose. The thermal study shows three endothermic peaks for grafted cyanoethyl cellulose while as cellulose, grafted and cyanoethyl cellulose has one endothermic peaks. The dielectric properties depend on the nitrogen content. These observations are closely correlated with the structure of the products such as types of side groups and the interaction between them. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 16 van 28 gevonden artikelen
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