Nanofibrillar Networks in Poly(ethyl methacrylate) and Its Silica Nanocomposites
نویسندگان
چکیده
Elizabeth A. Wilder,† Michael B. Braunfeld,§ Hiroshi Jinnai,| Carol K. Hall,† David A. Agard,§ and Richard J. Spontak*,†,‡ Departments of Chemical Engineering and Materials Science & Engineering, North Carolina State UniVersity, Raleigh, North Carolina 27695, Departments of Biochemistry & Biophysics and the Howard Hughes Medical Institute, UniVersity of California, San Francisco, California 94143, and Department of Polymer Science & Engineering, Kyoto Institute of Technology, Kyoto 606-8585, Japan
منابع مشابه
Microwave-assisted synthesis of SiO2 nanoparticles and its application on the flame retardancy of poly styrene and poly carbonate nanocomposites
Various morphologies of silica nanoparticles were synthesized by a microwave-assisted Pechini method. Silica nanostructures were synthesized via a fast reaction between tetra ethyl ortho silicate and ammonia at presence citric acid and other effective agents in Pechini procedure. Then for preparation of polymer-matrix nanocomposites, SiO2 nanoparticles were added to poly carbonate (PC) and poly...
متن کاملWater-Dispersible Silica-Polyelectrolyte Nanocomposites Prepared via Acid-Triggered Polycondensation of Silicic Acid and Directed by Polycations
The present work describes the acid-triggered condensation of silicic acid, Si(OH)4, as directed by selected polycations in aqueous solution in the pH range of 6.5–8.0 at room temperature, without the use of additional solvents or surfactants. This process results in the formation of silica-polyelectrolyte (S-PE) nanocomposites in the form of precipitate or water-dispersible particles. The mean...
متن کاملSynthesis and Examination of Nanocomposites Based on Poly(2-hydroxyethyl methacrylate) for Medicinal Use
Preparation of poly(2-hydroxyethyl methacrylate) (PHEMA) based nanocomposites using different approaches such as synthesis with water as the porogen, filling of polymer matrix by silica and formation of interpenetrating polymer networks with polyurethane was demonstrated. Incorporation of various biologically active compounds (BAC) such as metronidazole, decamethoxin, zinc sulphate, silver nitr...
متن کاملFree volume holes diffusion to describe physical aging in poly(mehtyl methacrylate)/silica nanocomposites.
The spontaneous thermodynamically driven densification, the so-called physical aging, of glassy poly(mehtyl methacrylate) (PMMA) and its nanocomposites with silica has been described by means of the free volume holes diffusion model. This mechanism is able to account for the partial decoupling between physical aging and segmental dynamics of PMMA in nancomposites. The former has been found to b...
متن کاملAbstract Submitted for the MAR13 Meeting of The American Physical Society The investigation of the viscoelastic properties of silica/PMMA nanocomposites as a function of silica surface chemistry1
Submitted for the MAR13 Meeting of The American Physical Society The investigation of the viscoelastic properties of silica/PMMA nanocomposites as a function of silica surface chemistry1 HEATHER CONWAY, DENIZ RENDE, RAHMI OZISIK, Rensselaer Polytechnic Institute — Poly(methyl methacrylate), PMMA, has been used as an economic alternative to glass and polycarbonate in differing situations because...
متن کامل