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Star-shaped and pho...
Star-shaped and photocrosslinked poly(1,5-dioxepan-2-one) : Synthesis and characterization
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Ryner, M. (författare)
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Valdre, A. (författare)
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- Albertsson, Ann-Christine (författare)
- KTH,Polymerteknologi
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(creator_code:org_t)
- 2002-05-08
- 2002
- Engelska.
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Ingår i: Journal of Polymer Science Part A. - : Wiley. - 0887-624X .- 1099-0518. ; 40:12, s. 2049-2054
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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visa färre...
Abstract
Ämnesord
Stäng
- 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.
Nyckelord
- 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
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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