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Crosslinking chemistry of curing carbon composites containing novolac/furfuryl alcohol resins and carbon black or mesophase pitch as additives
journal contribution
posted on 2011-09-15, 00:00 authored by X Zhang, Sarah KhorSarah Khor, D Gao, E SumThe crosslinking chemistry was studied for producing carbon composites using carbon black or mesophase pitch as additives and a binder containing novolac and furfuryl alcohol (FA) resins and hexamethylene tetramine (HMTA) as a crosslinker. Curing the composites to 205 °C generated FA, water and ammonia as the major volatile species released from the systems due to evaporation, condensation of FA and crosslinking reactions between the resins and HMTA, respectively. Carbon black or mesophase displayed a minimal effect on the chemical nature of the volatiles released from the curing. However, the carbon black particles, which were homogeneously distributed in the cured composite, produced a broad distribution of chemical environments and structures of the binder networks, and the chain motions of the binder were also modified. Mesophase pitch on the other hand was likely to participate in curing reactions of the resin phase and heterogeneous phase structures were detected only on a scale as small as ∼2 nm in the composite.
History
Journal
Materials chemistry and physicsVolume
129Issue
1-2Pagination
228 - 235Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0254-0584eISSN
1879-3312Language
engPublication classification
C Journal article; C1.1 Refereed article in a scholarly journalCopyright notice
2011, ElsevierUsage metrics
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No categories selectedKeywords
crosslinking chemistrycarbon compositespolymer binderssolid-state NMRScience & TechnologyTechnologyMaterials Science, MultidisciplinaryMaterials ScienceC-13 NMR-SPECTROSCOPYNUCLEAR-MAGNETIC-RESONANCECURED PHENOLIC RESINSFURFURYL ALCOHOLHIGH-RESOLUTIONNOVOLAC RESINSPOLY(METHYL METHACRYLATE)HEXAMETHYLENETETRAMINEBLENDSCARBONIZATION
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