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Synergistic flame retardancy effect of graphene nanosheets and traditional retardants on epoxy resin
Novel non-toxic halogen-free flame retardants are replacing traditional flame retardants in polymer and polymer matrix composite structures. In this study, graphene nanosheet (GNS) is investigatedin combination with traditional layered double hydroxide (LDH), layered rare-earth hydroxide (LRH), and phosphorus-based flame retardant (DOPO) to enhance the flame retardancy of epoxy resin. A synergisti...
http://www.polymer.cn//ss/zpfang/publicationsshow_9691.html |
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(JMCC) Transparent anhydride-cured epoxy nanocomposites reinforced with polyaniline stabilized nanosilica
Transparent anhydride–bisphenol-A epoxy systems filled with pristine nanosilica were prepared and compared with the counterparts with the nanosilica coated with surface initiated polymerization (SIP) prepared phosphoric acid (H3PO4) doped polyaniline (PANI). The rheological investigation on the bisphenol-A epoxy nanosuspensions demonstrated that the surface coating increased...
http://www.polymer.cn//ss/guhongbo/publicationsshow_9658.html |
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Polypyrrole Doped Epoxy Resin Nanocomposites with Enhanced Mechanical Properties and Reduced Flammability
For the liquid epoxy nanosuspensions with both fibril and spherical polypyrrole (PPy) nanostructures, a stronger PPy nanofibers/epoxy interaction and more temperature stable behavior with a lower flow activation energy of nanosuspensions with nanofibers (54.34 kJ mol?1) than that with nanospheres (71.15 kJ mol?1) were revealed by rheological studies. As well as the common enh...
http://www.polymer.cn//ss/guhongbo/publicationsshow_9649.html |
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Reinforced magnetic epoxy nanocomposites with conductive polypyrrole nanocoating on nanomagnetite as a coupling agent
The new function of polypyrrole (PPy) to serve as a coupling agent has been demonstrated in preparing conductive epoxy resin nanocomposites with PPy coating on magnetite (f-Fe3O4) nanoparticles. The effects of magnetic nanofiller loading level on the rheological behavior, thermal stability, dynamic mechanical properties, mechanical properties, electrical conductivity, dielec...
http://www.polymer.cn//ss/guhongbo/publicationsshow_9643.html |
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Study on Properties of Multi-walled Carbon Nanotubes/Epoxy Composites
Multi - walled carbon nanotubes (MWNTs) / epoxy compositeswere p repared by the combination of the physical and chemical methods. The relation between tensile strength and tensile modulus ofMWNTs/ epoxy composite and the addition amount ofMWNTswas investigated bymechanical tensile test. The tensile cross - section of the MWNTs/ epoxy composite was analyzed by SEM. T...
http://www.polymer.cn//ss/guhongbo/publicationsshow_9596.html |
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Superior flame retardancy of epoxy resin by the combined addition of graphene nanosheets and DOPO
In this paper, the thermal stability and fire retardant behavior of epoxy resin (ER) composites filled with graphene nanosheets (GNS) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) were investigated. Addition of GNS and DOPO changed the decomposition pathway of ER. During combustion, DOPO played a key flame retardancy role in the gas phase and the char enhancement in the condensed p...
http://www.polymer.cn//ss/zpfang/publicationsshow_9176.html |
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Effect of PEO molecular weight on the miscibility and dynamics in epoxy/PEO blends
In this work, the effect of poly(ethylene oxide) (PEO) molecular weight in blends of epoxy (ER) and PEO on the miscibility, inter-chain weak interactions and local dynamics were systematically investigated by multi-frequency temperature modulation DSC and solid-state NMR techniques. We found that the molecular weight (Mw) of PEO was a crucial factor in controlling the miscibility, chain dynamics a...
http://www.polymer.cn//ss/sunpingchuan/publicationsshow_9029.html |
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Superior Mechanical Properties of Epoxy Composites Reinforced by 3D Interconnected Graphene Skeleton
Epoxy-based composites reinforced by three-dimensional graphene skeleton (3DGS) were fabricated in resin transfer molding method with respect to the difficulty in good dispersion and arrangement of graphene sheets in composites by directly mixing graphene and epoxy. 3DGS was synthesized in the process of self-assembly and reduction with poly(amidoamine) dendrimers. In the formation of 3DGS, graphe...
http://www.polymer.cn//ss/xuzw/publicationsshow_8777.html |
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Sonochemical Transformation of Epoxy-Amine Thermoset into Soluble and Reusable Polymers
The degradation and reuse of epoxy thermosets have significant impact on the environments. We report that an epoxy?amine thermoset embedded with Diels?Alder (DA) bonds was transformed into soluble polymers via sonochemistry under mild temperature (ca. 20 °C) for the first time. Sonication could effectively induce the position-oriented cleavage of DA bonds (i.e., retro-DA) of the ...
http://www.polymer.cn//ss/xhzhang/publicationsshow_8491.html |
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Enhanced interfacial interaction of epoxy nanocomposites with activated graphene nanosheets
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The interfacial properties of epoxy nanocomposites reinforced by thermally exfoliated graphene nanosheets (TEG) and activated thermally exfoliated graphene nanosheets (a-TEG) were compared. The specific surface area (SSA) of a-TEG with well-defined micro-mesopore size distribution was 1000 m2/g, which was much higher that of TEG (550 m2/g). The interfacial...
http://www.polymer.cn//ss/xuzw/publicationsshow_8321.html |
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