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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.cnt//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.cnt//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.cnt//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.cnt//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.cnt//ss/xuzw/publicationsshow_8321.html |
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Fracture Behaviors of TRGO-Filled Epoxy Nanocomposites with Different Dispersion/Interface Levels
In this work, we investigate mechanical properties and fracture behaviors of thermally
reduced graphene oxide (TRGO)-filled epoxy composites with two different dispersion/
interface levels. The amphiphilic surfactant treatment of TRGO was found to promote the
dispersion in both water and epoxy, but also produced improved TRGO/epoxy interface. As
expected, incorporation of untre...
http://www.polymer.cnt//ss/tanglongcheng/publicationsshow_8306.html |
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006. Competitive absorption of epoxy monomers on carbon nanotube: a molecular simulation study
Position restrained (PR) molecular dynamics (MD) simulations were carried out on the bulk models for the two composite systems including epoxy monomers and carbon nanotube (CNT). The pair energies and the radial distribution functions (RDFs) were computed to evaluate the relative strength of the epoxy monomers binding to the CNT. It is found that the aromatic amine ...
http://www.polymer.cnt//ss/wuchaofu/publicationsshow_8296.html |
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003. Atomistic molecular simulations of structure and dynamics of crosslinked epoxy resin
Many excellent thermal and mechanical performances of cured epoxy resin products can be related to their specific network structure. In this work, a typical crosslinked epoxy resin was investigated using detailed molecular dynamics (MD) simulations, in a wide temperature range from 250 K to 600 K. A general constant-NPT MD procedure widely used for linear polymers failed to identify th...
http://www.polymer.cnt//ss/wuchaofu/publicationsshow_8293.html |
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Bioinspired Highly Electrically Conductive Graphene-Epoxy Layered Composites
Inspired by the nano/micro-scale hierarchical structure of nacre, we developed a new method for fabricating highly electrically conductive graphene-epoxy layered composites. In this new method, the graphene loading can be easily controlled, and the intrinsic three-dimensional (3-D) network of graphene in the composites results in high electrical conductivity. Through effective surface modification...
http://www.polymer.cnt//ss/cheng/publicationsshow_8010.html |
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Thermal conductivity epoxy resin composites filled with boron nitride
Boron nitride (BN) micro particles modified by silane coupling agent, γ-aminopropyl triethoxy silane (KH550), are employed to prepare BN/epoxy resin (EP) thermal conductivity composites. The thermal conductivity coefficient of the composites with 60% mass fraction of modified BN is 1.052?W/mK, five times higher than that of native EP (0.202?W/mK). The mechanical properties of the composites are...
http://www.polymer.cnt//ss/zhangqiuyu/publicationsshow_7811.html |
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