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Home  >  Medical Research Archives  >  Issue 149  > Amorphous Macromers as Potential Organic Matrix in Dental Composites
Published in the Medical Research Archives
Aug 2023 Issue

Amorphous Macromers as Potential Organic Matrix in Dental Composites

Published on Aug 31, 2023




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 (𝑆(𝑑), 𝑀𝑔%(𝑑) 𝖠 𝑆%(𝑑)and solubility (𝑆𝐿(𝑑) 𝖠 𝑆𝐿%(𝑑) 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 lower𝑆𝐿(𝑑). Matrix containing TEGDMA (T) as the dimethacrylate co-polymer showed the least 𝑆(𝑑). 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.

Author info

Anand Susila, Venkatesh Balasubramanian

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