| Autor: |
B. Martel, M. Morcellet, D. Ruffin, L. Ducoroy, M. Weltrowski |
| Zdroj: |
Journal of Inclusion Phenomena & Macrocyclic Chemistry; Dec2002, Vol. 44 Issue 1-4, p443-446, 4p |
| Abstrakt: |
CDs were grafted onto PET fibers by the intermediate of polycarboxylic acids that played the role of crosslinking agents. We evidenced that grafting occurred despite that no reaction could happen between the polycarboxylic acids and PET. It was concluded that the mode of grafting occurred through the formation of a crosslinked copolymer between PCA and CDs. This copolymer was not covalently fixed to the fibers, but physically adhered or was entangled into the fibrous network so that grafting was resistant to washings and was permanent. We report that the grafting rate depended on (i) temperature of curing; (ii) time of curing; (iii) the ratio PCA/CD. In the most drastic conditions, the weight increase of the fabrics due to the graft reaction could reach 2530%-wt. α, β, γ-CDs and HP-β-CD successfully reacted but not RAMEB because of its reduced number of free hydroxyl groups available for the esterification reaction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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