Understanding of intermolecular interaction in PVDF/PTW blends: Crystallization behavior, thermal, and dynamic mechanical properties

Lu, Jiajun; Bai, Huiyu; Wang, Wei; Zhang, Shengwen; Wang, Jin‐Yuan; Zhang, Yong; Liu, Xiaoya

doi:10.1002/app.43908

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…Ning et al reported novel heat and oil resistant TPV by dynamic vulcanization of PVDF and ethylene-vinyl acetate rubber. 40 Additionally, some other PVDF/rubber TPVs have also been investigated including FKM, 41 hydrogenated nitrile rubber, 42 poly(ethylene−butylacrylate−glycidyl methacrylate), 43 epoxidized NR 44 and acrylic rubber. 45 Therefore, in comparison with synthesized fluoroelastomer with precise molecular architectures, the preparation of fluorine-containing elastomers through dynamic vulcanization is a convenient, low-cost and industryapplicable approach.…”

Section: Introductionmentioning

confidence: 99%

Economical preparation of fluorine‐containing thermoplastic elastomer with good phase miscibility and elasticity based on dynamic vulcanization

Zhao

Xiong

Yan

et al. 2023

Polymer International

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Thermoplastic elastomers are a green and sustainable category of high performance polymers and show the great advantage of easy processability relative to conventional rubbers. In this work, a fluorine‐containing thermoplastic elastomer was prepared through dynamic crosslinking of poly(vinylidene fluoride)/poly(ethylene−methyl acrylate−glycidyl methacrylate) (PVDF/EGMA) blends with the aid of amino‐terminated crosslinker (KH602). The reaction kinetics of EGMA with KH602 were evaluated by the DSC Kissinger method with an activation energy (Ea) of 103.04 kJ mol−1. The increased ‘S‐type’ torque curve during dynamic crosslinking indicates the occurrence of chemical crosslinking while Fourier transform infrared spectra further demonstrate the dehydrofluorination of PVDF and the reaction between the amino group of KH602 and the epoxy group in EGMA. The prepared PVDF/EGMA (30/70) thermoplastic vulcanizate shows good reprocessability, mechanical robustness and elasticity. With increasing content of crosslinker, the stress at 300% increases from 2.3 MPa to 3.5 MPa while elongation at break decreases from 1150% to 380%. The PVDF/EGMA blend has a typical ‘sea‐island’ morphology with ca 7 μm dispersed phase while PVDF/EGMA thermoplastic vulcanizates have gradually elongated disperse phases due to improved interfacial miscibility as evidenced by quantitative nanomechanical mapping AFM modulus analysis. Therefore, dynamic vulcanization is an effective and economical approach to integrate thermoplasticity and rubber elasticity into plastic/rubber pairs with good phase miscibility. © 2023 Society of Industrial Chemistry.

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Section: Introductionmentioning

confidence: 99%

Economical preparation of fluorine‐containing thermoplastic elastomer with good phase miscibility and elasticity based on dynamic vulcanization

Zhao

Xiong

Yan

et al. 2023

Polymer International

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On the Electrochemical Properties of Poly(Vinylidene Fluoride)/Polythiophene Blends Doped with Lithium‐Based Salt

Kargar‐Esfandabadi,

Golshan,

Roghani‐Mamaqani

et al. 2024

Macro Materials & Eng

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In this study, polymer blends of polythiophene (PTH) and poly(vinylidene fluoride) (PVDF) are investigated by focusing on their structural and electrochemical characteristics. These blends displayed immiscibility confirmed through field emission scanning electron microscopy (FE‐SEM) and interaction assessments. PTH's role as a plasticizer is evident, diminishing crystallinity. A rise in PTH level led to a lower glass transition temperature and a higher melting point, suggesting reduced intermolecular forces and increased polymer chain flexibility. Conversely, a dispersed phase presence elevated the melting point, restricting chain movement and crystallization. The thermal properties of blends are enhanced by increased PTH content. Applying the Vogel–Tammann–Fulcher model to ionic conductivity measurements, it observed a direct relationship between temperature and free volume, impacting conductivity and ion transport numbers. Certain materials exhibit increased activation energies, indicating substantial thermodynamic barriers to local motion. Higher PTH content within the PVDF matrix notably increased the lithium ion transfer number from 0.22 to 0.71, a change tied to the C–S–C structure of polythiophene. However, elevated PTH levels also led to diminished negative charge transfer and ionic conductivity in the PTH‐PVDF blend compared to pure PVDF, likely due to an ionic conduction hindrance.

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TD-NMR analysis of structural evolution in PVDF induced by stress relaxation

et al. 2018

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Understanding of intermolecular interaction in PVDF/PTW blends: Crystallization behavior, thermal, and dynamic mechanical properties

Cited by 6 publications

References 30 publications

Economical preparation of fluorine‐containing thermoplastic elastomer with good phase miscibility and elasticity based on dynamic vulcanization

Economical preparation of fluorine‐containing thermoplastic elastomer with good phase miscibility and elasticity based on dynamic vulcanization

On the Electrochemical Properties of Poly(Vinylidene Fluoride)/Polythiophene Blends Doped with Lithium‐Based Salt

TD-NMR analysis of structural evolution in PVDF induced by stress relaxation

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