Nanostructured thermosets containing π-conjugated polymer nanophases: Morphology, dielectric and thermal conductive properties

Li, Jingang; Cong, Houluo; Li, Lei; Zheng, Sixun

doi:10.1016/j.polymer.2015.05.057

Cited by 16 publications

(13 citation statements)

References 53 publications

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“…[22][23][24] Compared to traditional micro fillers, these nano-sized inclusions confer unique features to epoxy blends. [25,26] One of these features relates to the interfacial area, where the distance between inclusions is comparable to the size of interfacial region. [27] This feature promotes interfacial stress transfer leading to significantly increased toughness of epoxy blends.…”

Section: Introductionmentioning

confidence: 99%

Control of inclusion size and toughness by reactivity of multiblock copolymer in epoxy composites

Zhan

Zhang

et al. 2016

Polymer

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In this paper, the strategy to achieve high fracture toughness and impact strength of epoxy blends by introducing a new family of reactive block copolymer (RBCP), poly[styrene-alt-(maleic anhydride)]block-polystyrene-block-poly(n-butyl acrylate)-block-polystyrene, with different reactivity is reported. Inclusions size of RBCP in cured blends was controlled from nanometer to micrometer by simply adjusting the fraction of reactive block in RBCP. The systematical study on the structure-property relationship revealed that the thermal and mechanical properties of modified blends strongly depend on inclusion size. The results suggested that blends containing nano inclusions of RBCP were more sensitive to test rates. And blends containing sub-micron inclusions showed substantially increased toughness in SENB measurements and IZOD impact tests without loss in T g. The findings of this work provide an insight on developing toughened epoxy thermosets utilized for both high and low fracture rates via innovative reactive blending.

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Section: Introductionmentioning

confidence: 99%

Control of inclusion size and toughness by reactivity of multiblock copolymer in epoxy composites

Zhan

Zhang

et al. 2016

Polymer

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“…For the BT/EP4 nanocomposites, the dielectric constant increased up to 14.6 at a frequency of 10 3 Hz. Previous research work revealed that in the binary thermosetting blends of the epoxy with PCL, the dielectric constant did not significantly change in comparison with that of the control epoxy . It was notable that the nanocomposites containing modified BT NPs (BT‐ g ‐PCL NPs) possessed higher dielectric constants than the composites containing plain BT NPs.…”

Section: Resultsmentioning

confidence: 99%

“…Previous research work revealed that in the binary thermosetting blends of the epoxy with PCL, the dielectric constant did not significantly change in comparison with that of the control epoxy. 52 It was notable that the nanocomposites containing modified BT NPs (BT-g-PCL NPs) possessed higher dielectric constants than the composites containing plain BT NPs. For example, the BT/EP3 nanocomposites (where the content of BT NPs was 10 wt %) displayed a dielectric constant of 14.0, whereas the dielectric constant of the nanocomposites with the same content of BT NPs was reported to be about 7.2.…”

Section: Thermal and Dielectric Propertiesmentioning

confidence: 99%

Enhancement of dielectric constants of epoxy thermosets via a fine dispersion of barium titanate nanoparticles

Zheng

2015

J of Applied Polymer Sci

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In this study, we examined a facile approach for achieving a fine dispersion of barium titanate (BT) nanoparticles (NPs) in epoxy thermosets. First, the surfaces of BT NPs were modified with poly(e-caprolactone) (PCL) via a surface-initiated ring-opening polymerization approach. We found that the PCL-grafted BT NPs were easily dispersed in epoxy thermosets. The fine dispersion of the PCL-grafted BT NPs in the epoxy thermosets was evidenced by transmission electron microscopy and dynamic mechanical thermal analysis. We found that the organic-inorganic nanocomposites displayed significantly enhanced dielectric constants and low dielectric loss compared to the control epoxy. The nanocomposites containing 14.1 wt % BT NPs possessed dielectric constants as high as at a frequency of 10 3 Hz. The dielectric loss was measured to be 0.002 at a frequency of 10 3 Hz. The improved dielectric properties are accounted for the fine dispersion of the BT NPs in the epoxy thermosets. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2016, 133, 43322.

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“…The improvement in properties is highly dependent on the formation of nanostructures. [1][2][3][4][5][6][7] The nanostructure can be constructed through self-assembly [8,9] or reaction-induced microphase separation (RIMPS) mechanism. [10,11] The self-assembly mechanism was first reported by Bates et al in 1997.…”

Section: Introductionmentioning

confidence: 99%

Toughening of epoxy by nanostructures with ABA triblock copolymers: An influence of organosilicon modification of block copolymer

Peng

Liu

et al. 2021

Polymer Engineering & Sci

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In this work, we investigated the effect of organosilicon modification of an ABA triblock copolymer on the morphologies, thermal properties, and fracture toughness of epoxy thermosets.First, a poly(ε-caprolactone)block-poly(butadiene) -block-poly(ε-caprolactone) triblock copolymer was synthesized through the ring-opening polymerization of ε-caprolactone by using an α,ω-dihydroxyl-terminated polybutadiene as the macromolecular initiator.

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Nanostructured thermosets containing π-conjugated polymer nanophases: Morphology, dielectric and thermal conductive properties

Cited by 16 publications

References 53 publications

Control of inclusion size and toughness by reactivity of multiblock copolymer in epoxy composites

Control of inclusion size and toughness by reactivity of multiblock copolymer in epoxy composites

Enhancement of dielectric constants of epoxy thermosets via a fine dispersion of barium titanate nanoparticles

Toughening of epoxy by nanostructures with ABA triblock copolymers: An influence of organosilicon modification of block copolymer

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