Home > Medical Research Archives > Issue 149 > Amorphous Macromers as Potential Organic Matrix in Dental Composites
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Published in the Medical Research Archives
Aug 2023 Issue
Amorphous Macromers as Potential Organic Matrix in Dental Composites
Published on Aug 31, 2023
DOI
Abstract
Objectives: Assess the thermal and hydrolytic stability of patented macromer- based dental polymer matrices and composites
Methods: Polymer matrices and composites based on a patented material (IP:343192) containing hybrid amorphous macromers co-polymerized with one of the 4 different dimethacrylates was prepared and the thermal and photo-thermal behavior were assessed. Diffusivity resistance and cross-link density of polymers were assessed. Sorption (π(π‘), ππ%(π‘) π π%(π‘)and solubility (ππΏ(π‘) π ππΏ%(π‘) of composites in chloroform (CHCl3), tetrahydrofuran (THF), carbon tetrachloride (CCL) and acetone (Ace) for varying durations (1h, 24h 1mo), and deionized water for 120h were determined.
Results: Dual Tg were noticed for both the matrices and composites; matrices containing BisGMA (G) and UDMA (U) as the dimethacrylate co-polymer showed significantly lowerππΏ(π‘). Matrix containing TEGDMA (T) as the dimethacrylate co-polymer showed the least π(π‘). Matrix containing BisEMA (E) had the highest cross-link density. photo-DSC of composites showed a Degree of Conversion of 97% at lower enthalpies (15-28J/g). None of the composites showed water solubility. All materials showed solubility in acetone with U being the least. Sorption and solubility in other organic solvents was lower and occurred only at longer immersion time.
Conclusions: Amorphous hybrid macromer-based polymer matrices and composites show promising thermal and hydrolytic behavior.
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