For all PEG-based hybrids, a decreasing trend of the residual masses (ascribable to ZrO 2 ) is found after the complete degradation of the polymer with increasing the PEG content, with the exception of PEG-free pure ZrO 2 material.
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Characterization of Hybrid Materials Prepared by Sol-Gel Method for Biomedical Implementations. A Critical Review.
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