City College will close today, January 26, 2015, at 3 p.m. due to inclement weather. Only essential personnel are expected to report to or remain at work for regular business hours. The college is closed Tuesday, January 27, 2015. Only essential personnel report to work.
Levich Institute Seminar
Tue, Feb 26
2:00 PM — 3:15 PM
Steinman Hall160 Convent Avenue
Steinman Hall, 312
SPEAKER: Professor Dilhan Kalyon, Stevens Institute. Dept of ChE and Materials ScienceTITLE: "Rheology, Processing, Structure Development and Ultimate Properties of Polymer/Nanotube Nanocomposites"
ABSTRACT: There are significant challenges in the dispersion of carbon nanotubes into polymeric resins and the processing of the resulting nanocomposites, PNC, into structured products with desired functionalities. Here results associated with the incorporation of multi-walled nanotubes into monoacrylate-terminated poly(ethylene glycol), poly(butylene terephthalate), poly(ether ether ketone), poly(vinylidene fluoride), Nylon 11, and epoxy resins will be presented. It will be shown that mixing needs to take place under optimum conditions, preferably guided by rheological characterization as a control tool, and conditions that result in the demixing and reagglomeration of the nanotubes need to be identified and eliminated. It will be shown that nanotubes introduce significant changes in crystallinity and crystalline morphologies for some semi-crystalline polymers and alter the rates of curing for thermosetting polymers. Finally, it will be demonstrated that various properties, including the viscoelasticity, electrical properties, swelling behavior, and flammability of shaped PNCs, are intimately related to the dispersion states of the nanotubes.