COLL 334 |
| Dental materials usually contain an organic and inorganic part. The organic phase is a mixtures of mono- and multifunctional monomers called resin. The inorganic part which percentage is about 60 percent shall allow the optimal mechanical properties for the requirements of dental materials. The main problem is the volumetric shrinkage of resins. Nanoparticles with reactive vinyl groups have potential use as dental materials. Because the major portion of polymerization is performed prior to the application by the dentist, limited volumetric shrinkage is expected during the final in situ photopolymerization step. In this work we have investigated the mechanical properties, volumetric shrinkage and viscosities of NCs. The size of nanoparticles as organofillers in swollen state was determined by dynamic laser light scattering (DLS) method and the dried form by scanning electron microscopy (SEM). Structures and reactivity of polymers were detected by nuclear magnetic resonance. (H NMR) |
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Polymer-Nanoparticle Systems: Theory, Simulation, Experiments
2:00 PM-5:00 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 227, Oral
Division of Colloid & Surface Chemistry |