Novel core–shell (dendrimer) epoxy tougheners: Processing and hot–wet performance

Nguyen, Felix N.; Berg, John C.

doi:10.1016/j.compositesa.2008.03.005

Cited by 27 publications

(20 citation statements)

References 16 publications

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“…NMR spectra were recorded using a Bruker AV‐600 spectrometer (150 MHz). Chemical shifts of 1 H NMR and C NMR peaks are reported in ppm, and methyl sulfoxide‐d was used as the solvent in all NMR measurements. Fourier transform infrared (FTIR) spectra were collected on a Thermo Scientific Nicolet iS5 FTIR spectrophotometer using ID7 ATR Accessory with Diamond Crystal.…”

Section: Methodsmentioning

confidence: 99%

“…1,8‐ Bis (4‐formylphenoxy)octane: 1 H‐NMR (150 MHz, DMSO‐d6, δ): 1.28–1.35 (m, 4H, CH 2 ),1.36–1.45 (m, 4H, CH 2 ), 1.68–1.76 (m, 4H, CH 2 ), 4.05 (t, 4H, OCH 2 ), 7.09 (d, 2H, Ar‐H), 7.84 (d, 2H, Ar‐H), 9.85 (s, 2H, CHO) …”

Section: Methodsmentioning

confidence: 99%

“…1,8‐ Bis (triphenylmethane)octane: 1 H‐NMR (150 MHz, DMSO‐d6, δ): 1.26–1.35 (m, 4H, O(CH 2 ) 3 (CH 2 ) 2 (CH 2 ) 3 O), 1.35–1.45 (m, 4H, O(CH 2 ) 2 CH 2 ‐), 1.60–1.72 (m, 4H, OCH 2 CH 2 ‐), 3.88 (t, 4H, OCH 2 ‐), 6.60–7.00 (24H, Ph‐H). C‐NMR (150 MHz, DMSO‐d6, δ): 25, 28, 53, 67, 114, 115, 130, 135, 137, 155, 157.…”

Section: Methodsmentioning

confidence: 99%

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Tetrafunctional epoxy as an all‐purpose modifier for homopolymerized bisphenol A diglycidyl ether

Miao

Han²,

et al. 2018

J of Applied Polymer Sci

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In some applications, homopolymerized epoxies, which offer better biocompatibility and lower water absorption than amine‐ and anhydride‐cured epoxy, are more preferable; however, using homopolymerized epoxy as matrix in composites still remains a challenge. Herein, homopolymerized bisphenol A diglycidyl ether curing systems with simultaneously improved tensile strength, impact strength, and glass transition temperature (Tg) were achieved by addition of small amounts of tetra‐functional epoxies (TFTEs) with different spacer lengths. Effects of spacer length in TFTE on thermal and mechanical properties were investigated. Results indicated that TFTE with the longest spacer length shows the best mechanical performance. In addition, effects of TFTE loading on thermal and mechanical properties were discussed. Compared with neat bisphenol A diglycidyl ether, addition of 5% tetraglycidyl‐1,10‐bis(triphenylmethane) decane leads to simultaneous improvements in tensile strength, impact strength, and Tg. Effects of thermal cycling on the mechanical properties were also reported. Results suggest that the modified homopolymerized epoxy shows good performances and could be used as matrix materials and possibly in some dental applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46431.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Tetrafunctional epoxy as an all‐purpose modifier for homopolymerized bisphenol A diglycidyl ether

Miao

Han²,

et al. 2018

J of Applied Polymer Sci

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“…Thermoplastic fibers significantly toughen brittle epoxy resin [1]. Microsized rubber particles [2][3][4], thermoplastic particles [5,6], inorganic particles [7][8][9][10] were also proven to toughen EP systems. Rubber particles are effective toughening agents in thermosets because they trigger the localized shear yielding in the related matrices.…”

Section: Introductionmentioning

confidence: 98%

Synergetic role of nanoparticles and micro-scale short carbon fibers on the mechanical profiles of epoxy resin

Zhang¹,

Rasheva²,

Karger‐Kocsis³

et al. 2011

Express Polym. Lett.

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Abstract. It was demonstrated in our previous work that the combined carbon nanofibers (CNFs) and microsized short carbon fibers (SCFs) in epoxy (EP) leads to significant improvements in the mechanical properties of the matrix. In this work, the effect of nano-SiO 2 particles, having an extremely different aspect ratio from CNFs, on the tensile property and fracture toughness of SCFs-filled EP was studied. It was revealed that the combined use of SCFs and silica nanoparticles exerts a synergetic effect on the mechanical and fracture properties of EP. Application of SCFs and the nanoparticles is an effective way to greatly enhance the modulus, strength and fracture toughness of the EP simultaneously. The synergetic role of the multiscale fillers was explained by prominent changes in the stress state near the microsized fillers and the plastic zone ahead of the crack tip. The synergetic role of multiscale fillers is expected to open up new opportunities to formulate highperformance EP composites.

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“…In these applications, epoxy systems are mostly used as a base material and higher bonding strength is needed. Among the possible approaches to improve the mechanical properties of epoxy systems, introduction of core shell rubbers (CSR) to epoxy systems can be considered [3][4][5]. By introducing liquid rubber and core-shell rubber (CSR) particles, mechanical characteristics such as peel and impact peel strengths can be improved [6,7].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Mechanical Characterization of Tack-free Surfaced CSR/Epoxy Adhesive Films

Chae

Hyun

et al. 2012

Molecular Crystals and Liquid Crystals

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High performance epoxy systems have been widely used in electronic devices, aerospace structures, and automotive parts. In this study, introduction of both core-shell rubber (CSR) and thermoplastics into epoxy systems was considered to improve mechanical properties as well as to make tack-free surfaced epoxy films. CSR particles were very uniformly dispersed into epoxy by means of ultrasonic dismembrator and homogenizer at the presence of polymeric dispersion agent. Well-dispersed CSR containing epoxy systems exhibited higher peel strengths at room temperature. Furthermore, peel strength as well as impact peel strength at low temperature could be comprehensively improved.

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Novel core–shell (dendrimer) epoxy tougheners: Processing and hot–wet performance

Cited by 27 publications

References 16 publications

Tetrafunctional epoxy as an all‐purpose modifier for homopolymerized bisphenol A diglycidyl ether

Tetrafunctional epoxy as an all‐purpose modifier for homopolymerized bisphenol A diglycidyl ether

Synergetic role of nanoparticles and micro-scale short carbon fibers on the mechanical profiles of epoxy resin

Preparation and Mechanical Characterization of Tack-free Surfaced CSR/Epoxy Adhesive Films

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