Formation of interfacial network structure via photo-crosslinking in carbon fiber/epoxy composites
Autor: | C. J. Fan, J. J. Zhao, Q. F. Lin, Xiaodong Zhou, S. H. Deng |
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Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
Glycidyl methacrylate
Materials science Polymers and Plastics General Chemical Engineering Photo-crosslinking lcsh:Chemical technology chemistry.chemical_compound Materials Chemistry Copolymer lcsh:TA401-492 lcsh:TP1-1185 Physical and Theoretical Chemistry Composite material Curing (chemistry) chemistry.chemical_classification Acrylate Polymer composites Interfacial network structure Atom-transfer radical-polymerization Organic Chemistry Random copolymers Polymer Epoxy Photopolymer chemistry visual_art visual_art.visual_art_medium lcsh:Materials of engineering and construction. Mechanics of materials |
Zdroj: | eXPRESS Polymer Letters, Vol 8, Iss 7, Pp 505-516 (2014) |
Popis: | A series of diblock copolymers (poly(n-butylacrylate)-co-poly(2-hydroxyethyl acrylate))-b-poly(glycidyl methacrylate) ((PnBA-co-PHEA)-b-PGMA), containing a random copolymer block PnBA-co-PHEA, were successfully synthesized by atom transfer radical polymerization (ATRP). After being chemically grafted onto carbon fibers, the photo- sensitive methacrylic groups were introduced into the random copolymer, giving a series of copolymers (poly(n-butylacry- late)-co-poly(2-methacryloyloxyethyl acrylate))-b-poly(glycidyl methacrylate)((PnBA-co-PMEA)-b-PGMA). Dynamic mechanical analysis indicated that the random copolymer block after ultraviolet (UV) irradiation was a lightly crosslinked polymer and acted as an elastomer, forming a photo-crosslinked network structure at the interface of carbon fiber/epoxy composites. Microbond test showed that such an interfacial network structure greatly improved the cohesive strength and effectively controlled the deformation ability of the flexible interlayer. Furthermore, three kinds of interfacial network structures, i) physical crosslinking by H-bonds, ii) chemical crosslinking by photopolymerization, and iii) interpenetrat- ing crosslinked network by photopolymerization and epoxy curing reaction were received in carbon fiber/epoxy composite, depending on the various preparation processes. |
Databáze: | OpenAIRE |
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