Self-toughening of epoxy resin through controlling topology of cross-linked networks

Tian, Nan; Rong-chang, Ning; Kong, Jie

doi:10.1016/j.polymer.2016.07.038

Cited by 64 publications

(47 citation statements)

References 66 publications

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“…A subsequent reaction with SBR by hydride transfer regenerates the polymer carbocation. This sulfur cross-linking mechanism is in accord with L. Bateman4041.…”

Section: Resultssupporting

confidence: 76%

The Synergy of Double Cross-linking Agents on the Properties of Styrene Butadiene Rubber Foams

Shao

et al. 2016

Sci Rep

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Sulfur (S) cross-linking styrene butadiene rubber (SBR) foams show high shrinkage due to the cure reversion, leading to reduced yield and increased processing cost. In this paper, double cross-linking system by S and dicumyl peroxide (DCP) was used to decrease the shrinkage of SBR foams. Most importantly, the synergy of double cross-linking agents was reported for the first time to our knowledge. The cell size and its distribution of SBR foams were investigated by FESEM images, which show the effect of DCP content on the cell structure of the SBR foams. The relationships between shrinkage and crystalline of SBR foams were analyzed by the synergy of double cross-linking agents, which were demonstrated by FTIR, Raman spectra, XRD, DSC and TGA. When the DCP content was 0.6 phr, the SBR foams exhibit excellent physical and mechanical properties such as low density (0.223 g/cm3), reduced shrinkage (2.25%) and compression set (10.96%), as well as elevated elongation at break (1.78 × 103%) and tear strength (54.63 N/mm). The results show that these properties are related to the double cross-linking system of SBR foams. Moreover, the double cross-linking SBR foams present high electromagnetic interference (EMI) shielding properties compared with the S cross-linking SBR foams.

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“…A subsequent reaction with SBR by hydride transfer regenerates the polymer carbocation. This sulfur cross-linking mechanism is in accord with L. Bateman4041.…”

Section: Resultssupporting

confidence: 76%

The Synergy of Double Cross-linking Agents on the Properties of Styrene Butadiene Rubber Foams

Shao

et al. 2016

Sci Rep

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“…It has been well known that loss tangent peak temperature, i.e., T g , can be used to evaluate phase separation in polymer blends. [46,47] As shown in Figure 4, AB0-cured resin exhibits a well-defined relaxation peak centered at 181 °C, which is responsible for the glass-rubber transition of the crosslinked polymer. But the BF/amine-cured samples (AB1-AB5) showed complex loss tangent curves at a heating rate of 3 °C min −1 .…”

Section: Resultsmentioning

confidence: 99%

Significant Improvement on Polybenzoxazine Toughness Achieved by Amine/Benzoxazine Copolymerization‐Induced Phase Separation

Zhao

et al. 2018

Macro Chemistry & Physics

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Two commercially available amines, octanediamine (ODM) and m‐xylylenediamine (MXDM), are chosen for tough polybenzoxazine resin due to their controllable capability to cause phase separation during the copolymerization with benzoxazine monomers. The toughening behavior and phase separation of the cured resins are investigated using tensile tests and analyses of dynamic mechanical analysis (DMA), scanning electron microscope, and thermal gravimetry–gas chromatography/mass spectroscopy. The resulting networks show remarkable toughness without obvious degradation in thermomechanical performance. Especially, when ODM/MXDM molar ratio is 1:1, an elongation rate of 10.55% and a breaking strength of 82.67 Mpa, which are 86% and 128% higher than that of the neat benzoxazine resin, respectively, are achieved. These findings open a new way to improve toughness of brittle polybenzoxazine resins.

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“…Epoxy‐based materials are widely employed as coating agents, structural adhesives, in microelectronics and as matrix materials for composites . Their mechanical and thermal properties can be improved by incorporating a number of fillers . Rubber nanoparticles and core‐shell particles, for example, have been extensively used for toughening purposes, although their tensile strength, stiffness, and glass transition temperature ( T g ) are significantly affected .…”

Section: Introductionmentioning

confidence: 99%

Mechanical and dynamic‐mechanical properties of silane‐treated graphite nanoplatelet/epoxy composites

Lavoratti

Zattera

Amico

2018

J of Applied Polymer Sci

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Thermoset resins are widely used for composite applications due to their excellent mechanical properties. To further enhance their performance, nanofillers such as graphite nanoplatelets (GrNP) have been used, and extra improvement may arrive from surface treating these fillers. This study aims to evaluate the influence of GrNP content and treatment with (3‐glycidyloxypropyl)trimethoxysilane and (3‐aminopropyl)triethoxysilane on curing behavior and mechanical and dynamic mechanical properties of GrNP/epoxy composites. Composites reinforced with 0.25 wt % GrNP displayed increased tensile strength by 11.8% compared to the neat resin. Addition of 0.5 wt % GrNP increased the glass transition temperature in 10°C compared to the neat polymer. Silane treated fillers showed an improvement in tensile strength and dynamic‐mechanical properties compared to the neat resin and non‐treated GrNP/epoxy composites at similar filler content. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46724.

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Self-toughening of epoxy resin through controlling topology of cross-linked networks

Cited by 64 publications

References 66 publications

The Synergy of Double Cross-linking Agents on the Properties of Styrene Butadiene Rubber Foams

The Synergy of Double Cross-linking Agents on the Properties of Styrene Butadiene Rubber Foams

Significant Improvement on Polybenzoxazine Toughness Achieved by Amine/Benzoxazine Copolymerization‐Induced Phase Separation

Mechanical and dynamic‐mechanical properties of silane‐treated graphite nanoplatelet/epoxy composites

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