Mechanical property improvement of carbon fiber reinforced polybenzoxazine by rubber interlayer

Ishida, Hatsuo; Chaisuwan, Thanyalak

doi:10.1002/pc.10056

Cited by 60 publications

(34 citation statements)

References 34 publications

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“…The concept of a uniform, thin low‐modulus layer at the fiber–matrix interface describing the unexpected lower values of modulus in some thermoset‐matrix composite systems has recently been found as a potential basis for explaining the antagonistic effects in NF‐modified MFC . In this study, the original FEA model (Figure , Table ) has been modified to comply with the character of crystallinity in polymers.…”

Section: Resultsmentioning

confidence: 99%

“…This may lead to a corresponding different degree of NF localization and ordering in the interfacial area, which may affect the crystallinity of both polymer components. The importance of the changed parameters of the interface consists, for example, in the fact that the presence of a very thin low‐modulus layer at the fiber surface can decrease the composite modulus significantly, as shown for high‐modulus fiber/epoxy composites …”

Section: Introductionmentioning

confidence: 99%

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Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Kelnar

Kratochvíl

Kaprálková

et al. 2017

J of Applied Polymer Sci

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Nanofillers (NF) in microfibrillar composites support melt‐drawing and may lead to improved performance. However, antagonistic effects have also been found. The deterioration of mechanical properties by drawing in the presence of NF, as found by other authors in analogous undrawn systems, has not yet been explained. Experiments indicating the importance of NF migration between the HDPE matrix and the PA6 fibrils in the course of drawing have led to a tentative conclusion of changed crystallinity in the interfacial area resulting in a layer with reduced modulus. This was confirmed by the finite element analysis considering the formation of a “soft” interface as a result of reduced content of HDPE spherulites at the fiber surfaces. The results show a marked impact of this phenomenon on modulus. This original concept presents a basis for explaining some antagonistic effects in multicomponent polymer systems and a tool for the more rational design of composite materials. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44712.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Kelnar

Kratochvíl

Kaprálková

et al. 2017

J of Applied Polymer Sci

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“…One of the most effective methods is by coating the carbon fibers with a ductile polymeric material to modify the mode of failure and thus the potential energy absorbing capacity of their composites [5][6][7]. However, many researches showed that thin coatings were finite in toughening the composites whereas thick coatings resulted in the reduction of composite strength and modulus [8,9]. In our previous study [10][11][12][13], similar results showing that the prolongation of the flexible blocks increased the thickness of the flexible layer and as a result the interfacial shear strength decreased due to the low cohesive strength and modulus of the flexible chains, were also obtained.…”

Section: Introductionmentioning

confidence: 99%

Formation of interfacial network structure via photo-crosslinking in carbon fiber/epoxy composites

Deng¹,

Zhao²,

Lin³

et al. 2014

Express Polym. Lett.

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Abstract.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 photosensitive methacrylic groups were introduced into the random copolymer, giving a series of copolymers (poly(n-butylacrylate)-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) interpenetrating crosslinked network by photopolymerization and epoxy curing reaction were received in carbon fiber/epoxy composite, depending on the various preparation processes.

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“…During the Vietnam War, it was reported that soft armors prepared from fabrics of fiber glass and nylon were used for ballistic protection [3]. Some of the commercial fibers used to manufacture armors include aramids (Kevlar TM or Twaron TM ) [4], nylon fiber [5], polyethylene fiber (Spectra TM or Dyneema TM ) [6,7], and carbon fiber [8,9]. The fibers should provide excellent impact resistance required for ballistic armors, and have high sonic velocity and high specific energy absorption as well as the capability to distribute kinetic energy upon ballistic impact [5].…”

Section: Introductionmentioning

confidence: 99%

KevlarTM Fiber-Reinforced Polybenzoxazine Alloys for Ballistic Impact Application

Rimdusit

Pathomsap²,

Kasemsiri³

et al. 2011

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Abstract. A light weight ballistic composites from KevlarTM -reinforcing fiber having polybenzoxazine (BA)/urethane prepolymer (PU) alloys as a matrix were investigated in this work. The effect of alloy compositions on the ballistic composite properties was determined. The increase of the elastomeric PU content in the BA/PU alloy resulted in samples with tougher characteristics; the storage modulus of the Kevlar TM -reinforced BA/PU composites increased with increasing the mass fraction of polybenzoxazine. A ballistic impact test was also performed on the Kevlar TM -reinforced BA/PU composites using a 9 mm handgun and it was found that the optimal composition of BA/PU alloys should be approximately 20wt% of PU. The extent of the delaminated area and interfacial fracture were observed to change with the varied compositions of the matrix alloys. The appropriate thickness of Kevlar TM -reinforced 80/20 BA/PU composite panel was 30 plies and 50 plies to resist the penetration from the ballistic impact equivalent to levels II-A and III-A of NIJ standard. The arrangement of composite panels with the higher stiffness panel at the front side also showed the best efficiency ballistic penetration resistance.

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Mechanical property improvement of carbon fiber reinforced polybenzoxazine by rubber interlayer

Cited by 60 publications

References 34 publications

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Antagonistic effects on mechanical properties of microfibrillar composites with dual reinforcement: Explanation by FEA model of soft interface

Formation of interfacial network structure via photo-crosslinking in carbon fiber/epoxy composites

KevlarTM Fiber-Reinforced Polybenzoxazine Alloys for Ballistic Impact Application

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