Stereocomplex mediated hydrogels have been prepared by mixing solutions of polymers of opposite chirality of either PEG‐(PLA)2 triblock copolymers or PEG‐(PLA)8 star block copolymers. The critical gel concentrations of the mixed enantiomer solutions were considerably lower compared to polymer solutions containing only the single enantiomer. Moreover, gel‐sol transition temperatures were increased and gel regions were expanded due to stereocomplexation. Rheology measurements showed that stereocomplexed hydrogels based on PEG‐(PLA)8 have higher storage moduli compared to those based on PEG‐(PLA)2. Stereocomplexed hydrogels prepared from 13 wt% PEG‐(PLA)2 solutions in PBS showed a storage modulus of 0.9 kPa at 37 °C, while at similar conditions stereocomplexed hydrogels of PEG‐(PLA)8 showed a storage modulus of 1.9 kPa at 10 wt%.
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Hiemstra et al. (2005) studied this question.
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