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By influencing both the interfacial adhesion and the morphology, compatibilizers determine the mechanical properties of polymer blends. Here, we study the mechanical properties, in particular the fatigue crack propagation (FCP) of immiscible blends of poly(2,6-dimethyl-1,4-phenylene ether)/poly(styrene-co-acrylonitrile) (PPE/SAN), compatibilized with Janus nanoparticles (JPs) and linear polystyrene-block-polybutadiene-block-poly(methyl...
Graphene oxide (GO) and its derivatives with vinyl and alkyl functional groups (mGO) were synthesized and dispersed into unsaturated polyester resin (UPR) to prepare nanocomposites. Successful chemical modification of the GO sheets was confirmed by infrared spectroscopy, thermogravimetric analysis, and X-ray diffraction. In contrast to unmodified GO, mGO was easily dispersed in UPR, even without sonication,...
This work explored the incorporation of a triblock copolymer in carbon fiber reinforced epoxy polymer composites (CFRPs) to improve their mode-I fracture toughness, GIc (J/m2). The triblock copolymer poly (styrene)-block-poly (butadiene)-block-poly (methylmethacrylate) (SBM) was used to modify the CFRP matrix at 5, 10 and 15 phr concentrations, respectively. CFRPs were manufactured using an in-house...
This paper investigates what effect network heterogeneity has on the thermal and non-linear mechanical properties of epoxy based asymmetric double network glasses. Asymmetric Double Network epoxies were formulated using miscible stoichiometric blends of amines following a controlled three stage cure schedule. The widely different reactivities of the aromatic and aliphatic amines allows for sequential...
In this work, hydroxylated HPEEK [poly (ether ether ketone)] was covalently grafted on to graphene oxide (GO) sheets and methodically characterized using FTIR, TEM and XPS. The epoxy composites with GO and HPEEK grafted graphene oxide (HPEEK-g-GO) were prepared using mechanical stirring coupled with a bath sonicator to improve the dispersion and were subsequently cured at 80 °C and 180 °C. With the...
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