Direct visualization of stretch-induced phase separation in methoxy silyl-terminated polypropylene oxide/epoxy resin-type polymer alloys via AFM nanomechanics: A toughening mechanism

Liang, Xiaobin; Miyafuji, Kiyoshi; Hara, Koki; Mogi, Kaede; Nishida, Rina; Liu, Haonan; Nakajima, Ken

doi:10.1016/j.polymer.2022.125343

Cited by 7 publications

(2 citation statements)

References 41 publications

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“…The cross-section microstructures of PN, PGN, and PCNT were characterized by AFM (MultiMode 8, Bruker AXS, USA) under tapping mode and PeakForce QNM mode [35]. Take PCNT-117 as an example, the measure diagram as shown in Fig.…”

Section: Characterizationsmentioning

confidence: 99%

Structural revolution of PVDF crystallized on nanocarbon surface on a gradient temperature stage and its dielectric properties

Wang

Liang

et al. 2023

Preprint

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Poly (vinylidene fluoride) (PVDF) has been widely concerned because of its various transformations of crystal phase as well as its special dielectric, piezoelectric, and other electrical properties. In this paper, the temperature gradient (T-gradient) was constructed for studying the temperature dependence of crystallization behavior of PVDF and the heterogenous nucleation effect of multiwall carbon nanotubes (MWCNT) and graphene nano-platelets (GN). The aggregate structure, the change content of PVDF conformation, and the influence of heterogenous nucleating agent on the crystallization behavior of PVDF formed at different crystallization temperature (Tc) were investigated through three different dimensions by using FTIR for surface, WAXD/SAXS for bulk and AFM for cross-section respectively. The results showed that the low temperature and heterogenous nucleating agent were both conductive to the formation of γ phase of PVDF. The content of γ phase reached to 77% when Tc was lower than 61 ℃, and the proportion of γ (021) peak increases from 1.7–7.0% when PVDF crystallized at Tc =117 ℃ induced by MWCNT-rich. And the high density of nucleus and low Tc lead to the lower lamellar thickness and lower crystallite size. Higher content and lower crystallite size of γ phase leads to higher dielectric constant. The dielectric constant of sample crystallized at 61 ℃ which was induced by GN was significantly increased up to 6.2 which can lay a foundation for its future application in the field of dielectric.

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Section: Characterizationsmentioning

confidence: 99%

Structural revolution of PVDF crystallized on nanocarbon surface on a gradient temperature stage and its dielectric properties

Wang

Liang

et al. 2023

Preprint

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“…It has been widely used in the study of micromechanical mechanisms of polymer materials. 13,14) In our previous works, the micromechanical mechanisms of a styrene-ethylene-butylenestyrene block copolymer (SEBS) thermoplastic elastomer were investigated using nano-palpation AFM, [15][16][17] and it was found that the microphase-separated structure had a significant effect on the macroscopic physical properties. 18) The disruption of the Polystyrene structural domain (i.e., hard segment) before and after elongation leads to changes in the macroscopic modulus.…”

Section: Introductionmentioning

confidence: 99%

The study on the micromechanical mechanism of PP/EPDM blends and PP/SEBS blends using atomic force microscopy-based nanomechanics

Hanai,

Ito,

Liang

et al. 2024

Jpn. J. Appl. Phys.

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Using a atomic force microscope-based nanomechanics to measure the micromechanical properties of different polymer blends, we found that the miscibility of the blend system affects the phase structure and micromechanical properties at the nanoscale, which further affects macroscopic mechanical properties of materials. In the immiscible polypropylene / ethylene propylene diene rubber blends, the microscopic phase structure is connected to the macroscopic mechanical properties of the material, since the microscopic modulus of elasticity of the phases remains constant even if the blend ratio is changed. On the other hand, in the partial miscible polypropylene / styrene-ethylene-butylene-styrene block copolymer blends, the macroscopic mechanical properties of the material are determined by the combination of the microscopic phase structure and the microscopic elastic modulus, because the microscopic elastic modulus of each phase changes with the blending ratio.

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Competition effect of solid-state stretching induced orientation and phase separation on stereocomplex crystallization of PLLA/PDLA during annealing

Liu

Wang

Huang

et al. 2023

Polymer

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Direct visualization of stretch-induced phase separation in methoxy silyl-terminated polypropylene oxide/epoxy resin-type polymer alloys via AFM nanomechanics: A toughening mechanism

Cited by 7 publications

References 41 publications

Structural revolution of PVDF crystallized on nanocarbon surface on a gradient temperature stage and its dielectric properties

Structural revolution of PVDF crystallized on nanocarbon surface on a gradient temperature stage and its dielectric properties

The study on the micromechanical mechanism of PP/EPDM blends and PP/SEBS blends using atomic force microscopy-based nanomechanics

Competition effect of solid-state stretching induced orientation and phase separation on stereocomplex crystallization of PLLA/PDLA during annealing

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