Effect of cross-linking agents on the molecular properties of denture base resins
| Autor: | M. A. Moharram, K. N. Abdel Nour, N. A. Badr, Z. A. Abou-Table, N. Abdel Hakeem |
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| Rok vydání: | 1992 |
| Předmět: |
Materials science
Mechanical Engineering Infrared spectroscopy Dielectric Epoxy Absorbance chemistry.chemical_compound Monomer Chemical engineering chemistry Mechanics of Materials visual_art Polymer chemistry visual_art.visual_art_medium Denture base Molecule General Materials Science Triethylene glycol |
| Zdroj: | Journal of Materials Science. 27:6041-6046 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/bf01133747 |
| Popis: | Infrared spectroscopy and dielectric properties were used to investigate the molecular structure and the degree of cross-linking in denture base resins by the determination of the amount of residual monomer. It was found that the addition of triethylene glycol dimethacrylate (TEGDMA) or tetrahydrofurfuryl methacrylate (THFMA) with 12% or 17% by weight of the monomer to the resins reduces the amount of residual monomer in the heat-cured denture base resins. It was found that the dielectric constant and the absorbance of the C-C bond at 1625cm−1 increased with increasing residual monomer content. The results also indicated that the dielectric constant varies linearly with the absorbance ratio,A (1625 cm−1)/A (1725cm−1). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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