Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 105, Issue 34, Pages 8069-8076Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp004083h
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Experimental studies and theoretical predictions of the bulk-degradation behavior of nonideal PLA-b-PEG-b-PLA hydrogels were performed. The theoretical predictions are based on a previously developed model to which refinements have been made, including the incorporation of a more realistic description of the crosslinked, copolymer network structure. Also, structural complexities such as unreacted vinyl groups, multiple degradation sites along the polymer chains, and distributions in the degrees of polymerization of the crosslinks, cycles, and backbone chains that comprise the network are now included in the model. Each of these factors has a dramatic effect on the bulk-degradation behavior of the hydrogels, and this second generation model incorporates these factors into the theoretical description of the experimental system with only a minimal increase in the number of parameters and complexity of the model equations.
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