Preparation and dielectric properties of poly(acrylonitrile-<i>co</i>-2,2,2-trifluoroethyl methacrylate) materials<i>via</i>radical emulsion copolymerization

Kadimi, Amal; Kaddami, Hamid; Ounaies, Zoubeida; Habibi, Youssef; Dieden, Reiner; Améduri, Bruno; Raihane, Mustapha

doi:10.1039/c9py00673g

Cited by 11 publications

(14 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The origin of the secondary relaxation can only be attributed to the movements of the monomer units according to the crankshaft mechanisms as in the case of the PAN homopolymer 24,25 and the rotation of side ester group of MATRIF. 18 At very low frequencies (0.1 to 10 Hz) and high temperatures (above 85 C), an increase of the real and imaginary parts of the permittivity was observed. In fact, the value of permittivity of amorphous polymer poly(AN-co-MATRIF), ε 0 , at 0.1 Hz is close to 12 at 30 C, and reaches the value of 30 at 100 C ( Figure 1A).…”

Section: Thermal Propertiesmentioning

confidence: 91%

“…This indicates that in the nanocomposites some layered structure of the clay was destroyed due to the in situ polymerization of AN and MATRIF monomers, and that the clay is exfoliated, indeed, the coexistence of intercalated structures cannot be excluded. 18 The XRD results alone were not conclusive for determining the morphology of nanocomposites due to the preferred clay orientations or clay dilution or peak broadening. Therefore, TEM observations for poly(AN-co-MATRIF)/CTA-BDT nanocomposites containing 1 and 3 wt% nanoclay loading were performed to support the XRD result and also to reveal the real structures and distributions of the clay layers.…”

Section: Structural and Morphological Characterizationsmentioning

confidence: 98%

“…A similar result was reported by our team in some copolymers prepared by bulk or solution (acetonitrile) and emulsion radical copolymerization of cyano monomers (ie, AN, methacrylonitrile and vinylidene cyanide) with fluorinated (meth)acrylates such as MATRIF and 2,2,2-trifluoroethyl acrylate. 16,18 3.3 | Dielectric studies of poly(AN-co-MATRIF) copolymer matrix Figure 4A,B shows the overall behavior of the real ε 0 and imaginary ε 00 parts of the dielectric permittivity for poly(AN-co-MATRIF) matrix according to the frequency in the temperature range from 30 C to 100 C.…”

Section: Thermal Propertiesmentioning

confidence: 99%

“…It should be mentioned that the poly(AN-co-MATRIF) exhibits a dynamic scenario involving two relaxation mechanisms, a primary α-relaxation associated with the polymer's glass rubbery transition and a secondary β-relaxation arising from the side ester group of MATRIF and localized segmental motions. 18 The α-relaxation mechanism is the dominant phenomenon evident at temperatures above 75 C and at frequencies from 0.1 to 10 kHz. This finding is confirmed by the glass transition temperature value T g = 68.9 C, determined by DSC.…”

Section: Thermal Propertiesmentioning

confidence: 99%

“…The resulting poly(AN-co-MATRIF) copolymers were characterized by 1 H, 13 C NMR ( 13 C Nuclear Magnetic Resonance) and Fourier-Transform Infrared (FTIR) spectroscopies, Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), and Dielectric Spectroscopy (DS). 18 The dielectric properties of these polymer films showed that the dielectric permittivity was improved with increasing AN molar content. In addition, the obtained dielectric strength, Δε(poly(AN-co-MATRIF) 75/25) = 15.5 is about seven times higher than that of PMATRIF (2.1).…”

Section: Introductionmentioning

confidence: 95%

See 4 more Smart Citations

Dielectric and interfacial properties investigation of poly(acrylonitrile‐co‐2,2,2‐trifluoroethyl methacrylate) copolymer/organomodified beidellite clay nanocomposites

et al. 2020

Self Cite

View full text Add to dashboard Cite

The dielectric properties of fluorinated cyano copolymer poly(acrylonitrileco-2,2,2-Trifluoroethyl methacrylate) (poly[AN-co-MATRIF]), reinforced with a natural Moroccan beidellite nanoclay organomodified with cetyltrimethylammonium bromide were studied. The effect of varying nanofillers loadings (1 wt%, 2 wt%, 3 wt%, and 5 wt%) on the molecular dynamics was investigated using broadband dielectric spectroscopy from 10 −1 to 10 6 Hz and temperatures ranging between 30 C to 100 C. For the copolymer matrix, the real (ε 0

show abstract

Section: Thermal Propertiesmentioning

confidence: 91%

Section: Structural and Morphological Characterizationsmentioning

confidence: 98%

Section: Thermal Propertiesmentioning

confidence: 99%

Section: Thermal Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

See 3 more Smart Citations

Dielectric and interfacial properties investigation of poly(acrylonitrile‐co‐2,2,2‐trifluoroethyl methacrylate) copolymer/organomodified beidellite clay nanocomposites

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

Reactivity Ratios Estimation of the Free‐Radical Polymerization of Itaconic Acid and N‐Vinyl‐2‐Pyrrolidone by the Error‐in‐Variables Methodology

Krieger¹,

Araújo²,

Sayer³

2020

Macro Reaction Engineering

View full text Add to dashboard Cite

commonly used method for determining the reactivity ratios of a copolymerization reaction is by linearization of the Mayo-Lewis equation, such as those first pioneered by Fineman and Ross [6] and Kelen and Tudos. [7] Such methods, however, have been found to alter the error structure of the collected data, giving statistically incorrect results, [8] and are still in use to this day. [9-14] This problem was solved with the use of nonlinear parameter estimation techniques, such as the error-in-variables method (EVM), which are based on sound statistical theory (Bayesian approach) and return parameter estimates with joint confidence regions. [15,16] For metallic catalyzed copolymerizations the ratios can be calculated by directly using monomer kinetic propagation parameters combined with specialized molecular weight distribution deconvolution software. [17] Part of the reason for why methods such as Fineman-Ross and Kelen-Tudos are still used to this day is not only due to their ease of use and traditional weight but also because of a lack of widespread and publicly available alternatives that can be used and modified freely to tackle specific problems. This work seeks to lessen the lack of availability of these more statistically sound methods so that others may use and further contribute to their development in a free environment, in particular of EVM. Besides the reports of the groups who worked on the early development of EVM, [18-21] other groups worked on their own implementations of EVM. [22-24] None of these codes is easily accessible. Poly[(itaconic acid)-co-(N-vinyl-2-pyrrolidone)] (PVPIA) is reported as being a hydrophilic, highly biocompatible copolymer [25] that, when synthesized in the presence of a crosslinker or through UV or gamma-ray irradiation, produces a crosslinked hydrogel that may present swelling rates of up to 1500%. [26] It can be used as a heavy metal ion remover in waste-water treatment, [27,28] as an enzyme immobilization support structure, [29] and as a medium for the controlled release of drugs. [30] It is also worth noting that except for applications as a heavy metal ion remover in waste-water treatment, [27,28] the Itaconic Acid content used was below 10% (between 3% and 8%) of the total initial monomer charge. However, reports of the copolymer when prepared through free radical chain polymerization are severely limited and so are descriptions of its physical properties and possible applications. Designed copolymers require an understanding of the relative reactivity ratios of the monomer pair and a proper regression technique that can extract this data from the experiments. An implementation of the error-in-variables method previously describes in the literature is written and made available for use, along with an high-performance liquid chromatography (HPLC) methodology for acquiring the kinetic data for the regression analysis of the itaconic acid and N-vinyl-2-pyrrolidone (IA/NVP) free-radical copolymerization system. From the data, it is observed that higher initial mole fract...

show abstract

Nanocellulose from Date Palm: Production, Properties and Applications

Hamou

Erchiqui

Habibi³

et al. 2023

Composites Science and Technology

View full text Add to dashboard Cite

Preparation and dielectric properties of poly(acrylonitrile-co-2,2,2-trifluoroethyl methacrylate) materialsviaradical emulsion copolymerization

Abstract: Radical emulsion copolymerization of acrylonitrile (AN) with 2,2,2-trifluoroethyl methacrylate (MATRIF) and their homopolymerization initiated by potassium persulfate (KPS) were studied.

Cited by 11 publications

References 71 publications

Dielectric and interfacial properties investigation of poly(acrylonitrile‐co‐2,2,2‐trifluoroethyl methacrylate) copolymer/organomodified beidellite clay nanocomposites

Dielectric and interfacial properties investigation of poly(acrylonitrile‐co‐2,2,2‐trifluoroethyl methacrylate) copolymer/organomodified beidellite clay nanocomposites

Reactivity Ratios Estimation of the Free‐Radical Polymerization of Itaconic Acid and N‐Vinyl‐2‐Pyrrolidone by the Error‐in‐Variables Methodology

Nanocellulose from Date Palm: Production, Properties and Applications

Contact Info

Product

Resources

About