Now showing items 41-50 of 109
Recycling of waste tire rubber: microwave devulcanization and incorporation in a thermoset resin
This study focused on the possibility of recycling Waste Tire Rubber (WTR) to be used as polymer modifier. Thus, WTR was grinded into powder, at ambient temperature, with a disc mill PQ500 and microwave electromagnetic ...
Intermolecular interactions on amine-cured epoxy matrices with different crosslink densities. influence on the hole and specific volumes and the mechanical behavior
(John Wiley & Sons Inc, 2009-07)
The architecture of an epoxy matrix was modified by curing the resin with mono-/diamine mixtures having identical chemical structures. Both hole volume and specific volume variations were studied by positron annihilation ...
Thermoplastic-modified epoxy resins cured with different functionalities amine mixtures: Morphology, thermal behavior, and mechanical properties
Epoxy matrices inherent brittleness and poor crack resistance make necessary some form of toughening.In this work, to improve their fracture toughnessand ductility epoxy matrices were modified by changing its architecture ...
Free-radical polymerization induced macrophase separation in poly(methyl methacrylate)/dimethacrylate blends: experiment and modeling
(Pergamon-elsevier Science Ltd, 2013-09-13)
This work presents the analysis of a polymerization-induced macrophase separation taking place during free-radical copolymerization of styrene and dimethacrylate in the presence of poly(methyl methacrylate) (PMMA) as a ...
Surface relief gratings inscription in linear and crosslinked azo modified epoxy-isocyanate polymers
This work analyses the SRG forming ability of a linear and a crosslinked polymer, both based on the same azo chromophore (Disperse Red 19, DR19) and diisocyanate (4,4´-metilen-bis(cyclohexyl isocyanate), DI) with similar ...
Thermal stability of polyethylene terephthalate (PET): Oligomer distribution and formation of volatiles
(John Wiley & Sons LtdW SussexInglaterra, 1999)
Ultra-thin films of alternating semi-interpenetrating layers of a conducting polymer with thermosetting phenolic resins for sensor application
(AMER SCIENTIFIC PUBLISHERS, 2008)
In this work a new method for crosslinking ultra-thin films with potential applications in sensor systems is proposed. The films were produced by layer-by-layer (LbL) assembly using a conducting polymer, poly(o-ethoxyaniline) ...
Cardanol-formaldehyde thermoset composites reinforced with buriti fibers: Preparation and characterization
(Elsevier Sci LtdOxfordInglaterra, 2010)
Biobased composites from glyoxal-phenolic resins and sisal fibers
(ELSEVIER SCI LTD, 2010)
Lignocellulosic materials can significantly contribute to the development of biobased composites. In this work, glyoxal-phenolic resins for composites were prepared using glyoxal, which is a dialdehyde obtained from several ...
Chemical Modifications in Styrene-Butadiene Rubber after Microwave Devulcanization
(AMER CHEMICAL SOCWASHINGTON, 2012)
Microwave devulcanization has been studied as a method for elastomer recycling, which is based on the conversion of the reticulated and infusible structure of thermosetting rubbers in free polymeric chains able to be ...