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- Title
Dynamic Mechanical Analysis and Hydrolytic Degradation Behavior of Linear and Branched Poly( L-lactide)s and Poly( L-lactide- co-glycolide)s.
- Authors
Atkinson, Jeffrey L.; Vyazovkin, Sergey
- Abstract
Linear and branched poly(lactide)s and poly(lactide- co-glycolide)s are synthesized using stannous (II) 2-ethylhexanoate and alcoholic co-initators resulting in polymers with 1, 2, 25, or 51 arms. 1-dodecanol is used to produce the 1-arm polymer, poly(ethylene glycol) is used for the 2-arm polymers, and poly(glycidol)s of appropriate molecular weights are used to initiate the 25- and 51-arm branched polyesters. The polymers are evaluated by melt rheology and dynamic mechanical analysis. In vitro degradation is investigated in phosphate buffer pH 7.4 at 37 °C for 28 d for moisture uptake and mass loss. Degraded samples are analyzed by gravimetry, differential scanning calorimetry, dilute solution viscometry (Cannon-Fenske), and gel-permeation chromatography.
- Publication
Macromolecular Chemistry & Physics, 2013, Vol 214, Issue 7, p835
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201200622