Dufresne, Alain; Reche, Laura; Marchessault, Robert H. et Lacroix, Monique 
ORCID: https://orcid.org/0000-0002-2042-4033
(2001).
Gamma-ray crosslinking of poly(3-hydroxyoctanoate-co-undecenoate)
International Journal of Biological Macromolecules
, vol. 29
, nº 2.
pp. 73-82.
DOI: 10.1016/s0141-8130(01)00152-0.
Résumé
The gamma-ray crosslinking of films made of poly(3-hydroxyoctanoate) containing undecenoate moieties (up to 33 mole%) were studied. X-ray diffraction, thermal analysis, dynamic mechanical analysis (DMA), solid state nuclear magnetic resonance (NMR) spectroscopy and degree of crosslinking (swelling analysis) as a function of irradiation dose were evaluated for treatments in air or in N(2) atmosphere. After uncrosslinked material was isolated by CHCl(3) extraction, solid state NMR data suggested that only a small percentage of the double bonds took part in the formation of irradiation crosslinks. Crosslinking in N(2) was more efficient than in air and a 20 kGy dose was sufficient for optimal crosslinking. The X-ray diffraction patterns of the polymer films were unaffected by moderate irradiation. The use of sodium hypochlorite to isolate poly(3-hydroxyoctanoate-co-undecenoate) samples resulted in partial chlorination of the double bonds and considerable depolymerization.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | Pseudomonas oleovorans; Crosslinking; Poly(3-hydroxyalkanoate; Thermal analysis; X-ray diffraction; Swelling; Cross-polarization/magic angle spinning |
| Centre: | Centre INRS-Institut Armand Frappier |
| Date de dépôt: | 07 mars 2025 21:12 |
| Dernière modification: | 07 mars 2025 21:12 |
| URI: | https://espace.inrs.ca/id/eprint/14633 |
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