Star-shaped and photocrosslinked poly(1,5-dioxepan-2-one): Synthesis and characterization
2002 (English)In: Journal of Polymer Science Part A: Polymer Chemistry, ISSN 0887-624X, E-ISSN 1099-0518, Vol. 40, no 12, 2049-2054 p.Article in journal (Refereed) Published
New star-shaped and photocrosslinked poly(1,5-dioxepan-2-one) (PDXO) has been synthesized through ring-opening polymerization initiated by SnOct(2)/pentaerythritol. The star-shaped PDXO was end-functionalized by acrolyol chloride to form acrylate end groups. The end-functionalized PDXO was photocrosslinked initiated by 2,2-dimethoxy-2-phenylacetophenone. The gel content ranged from 80 to 99%, indicating a high degree of crosslinking. The thermal properties of the star-shaped PDXO and the photocrosslinked PDXO were analyzed by differential scanning calorimetry. The glass-transition temperature was determined to approximately -32 degreesC for the crosslinked PDXO. The viscosity numbers were determined for star-shaped PDXO, with reference to linear homologues. The star-shaped PDXO had lower viscosity numbers than the linear counterparts, The crosslinked PDXO showed a rather hydrophilic surface as compared with other resorbable polyesters. The advancing contact angle was 64 +/- 2, and the receding angle was 57 +/- 4.
Place, publisher, year, edition, pages
2002. Vol. 40, no 12, 2049-2054 p.
crosslinking, elastomers, hydrophilic polymers, photopolymerization, poly(1,5-dioxepane-2-one), ring-opening polymerization, ring-opening polymerization, electron-beam preirradiation, in-vitro degradation, epsilon-caprolactone, l-lactide, 1,5-dioxepan-2-one, networks, poly(epsilon-caprolactone), polyesters, acrylamide
IdentifiersURN: urn:nbn:se:kth:diva-21565DOI: 10.1002/pola.10304ISI: 000175777300014OAI: oai:DiVA.org:kth-21565DiVA: diva2:340263
QC 201005252010-08-102010-08-10Bibliographically approved