Influence of chlorotrifluoroethylene on crystal structure and polymer dynamics of poly(vinylidenefluoride-co-chlorotrifluoroethylene) antibacterial copolymers

Wisatre Kongcharoensuntorn; Pornpen Atorngitjawat; Wisatre Kongcharoensuntorn; Pornpen Atorngitjawat

doi:10.3934/matersci.2023009

AIMS Materials Science

2023, Volume 10, Issue 1: 164-181. doi: 10.3934/matersci.2023009

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Research article

Influence of chlorotrifluoroethylene on crystal structure and polymer dynamics of poly(vinylidenefluoride-co-chlorotrifluoroethylene) antibacterial copolymers

Wisatre Kongcharoensuntorn ¹,
Pornpen Atorngitjawat ^{2
,
,}

1.
Department of Biology, Faculty of Science, Burapha University, Chonburi 20131, Thailand
2.
Department of Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand

Received: 25 July 2022 Revised: 01 January 2023 Accepted: 12 January 2023 Published: 18 January 2023

The effect of chlorotrifluoroethylene (CTFE) on dynamic relaxations of poly(vinylidenefluoride-co-chlorotrifluoroethylene) films (P(VDF-CTFE)) containing 0, 10, 15 and 20% of CTFE was investigated via broadband dielectric spectroscopy (DRS) and dynamic mechanical analysis (DMA). The interpretation was accompanied by the crystal structure obtained from Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, small-angle X-ray scattering and differential scanning calorimetry. Increment of CTFE contents caused reducing the degree of crystallinity but did not impact the long period, lamellar thickness, and amorphous layer thickness. Four dynamic processes were clearly observed in DRS spectra for the neat poly(vinylidene fluoride) and P(VDF-CTFE) which were attributed to the local motion of amorphous chains (β), the segmental relaxation of amorphous chains (α₁), the local conformational rearrangement of the TGTGʹ conformation (α₂) and the process associated with Maxwell–Wagner–Sillars interfacial polarization (α_MWS). The extra relaxation was observed for P(VDF-CTFE), which was more likely associated to the molecular motion of CTFE chain segments (α_c), correspondent with DMA results. These PVDF and P(VDF-CTFE) conducted as self-antibacterial materials.
- fluoropolymer,
- smart polymer,
- dielectric relaxation,
- conformational disorder,
- lamellar thickness,
- antibacterial activity
Citation: Wisatre Kongcharoensuntorn, Pornpen Atorngitjawat. Influence of chlorotrifluoroethylene on crystal structure and polymer dynamics of poly(vinylidenefluoride-co-chlorotrifluoroethylene) antibacterial copolymers[J]. AIMS Materials Science, 2023, 10(1): 164-181. doi: 10.3934/matersci.2023009

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Abstract

The effect of chlorotrifluoroethylene (CTFE) on dynamic relaxations of poly(vinylidenefluoride-co-chlorotrifluoroethylene) films (P(VDF-CTFE)) containing 0, 10, 15 and 20% of CTFE was investigated via broadband dielectric spectroscopy (DRS) and dynamic mechanical analysis (DMA). The interpretation was accompanied by the crystal structure obtained from Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, small-angle X-ray scattering and differential scanning calorimetry. Increment of CTFE contents caused reducing the degree of crystallinity but did not impact the long period, lamellar thickness, and amorphous layer thickness. Four dynamic processes were clearly observed in DRS spectra for the neat poly(vinylidene fluoride) and P(VDF-CTFE) which were attributed to the local motion of amorphous chains (β), the segmental relaxation of amorphous chains (α₁), the local conformational rearrangement of the TGTGʹ conformation (α₂) and the process associated with Maxwell–Wagner–Sillars interfacial polarization (α_MWS). The extra relaxation was observed for P(VDF-CTFE), which was more likely associated to the molecular motion of CTFE chain segments (α_c), correspondent with DMA results. These PVDF and P(VDF-CTFE) conducted as self-antibacterial materials.

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