Poly (ether ether ketone) derivatives: Synthetic route and characterization of nitrated and sulfonated polymers

Conceição, Thiago Ferreira da; Bertolino, José Roberto; Barra, Guilherme Mariz de Oliveira; Pires, Alfredo T. N.

doi:10.1016/j.msec.2008.10.005

Cited by 19 publications

(21 citation statements)

References 18 publications

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“…18 The solution was 0.2 mol L -1 sodium chloride in a 1% (m/v) acetic acid aqueous solution at 25 o C. The chitosan deacetylation degree (DD) more than 75% (according to the supplier) was determined through potentiometric analysis using a conductivimeter, model CG220 (Gehaka), at 25 ºC. Initially, the chitosan was dissolved in a 0.09 mol L -1 HCl aqueous solution, maintained under stirring for 24 h and the conductivity was evaluated with the addition of 0.01 mol L -1 sodium hydroxide.…”

Section: Chitosan Characterization: Molecular Weight and Deacetylatiomentioning

confidence: 99%

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Crosslinked chitosan/poly (vinyl alcohol) blends with proton conductivity characteristic

Witt¹,

Barra²,

Bertolino³

et al. 2010

J. Braz. Chem. Soc.

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Section: Chitosan Characterization: Molecular Weight and Deacetylatiomentioning

confidence: 99%

“…17,18 The aim of this study is to obtain an electrolyte material by blending chitosan chemically modified with SSA and PVAL. This system was characterized and its physicochemical properties were analyzed, with the main focus being on proton conductivity.…”

Section: Introductionmentioning

confidence: 99%

Crosslinked chitosan/poly (vinyl alcohol) blends with proton conductivity characteristic

Witt¹,

Barra²,

Bertolino³

et al. 2010

J. Braz. Chem. Soc.

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“…Thermogravimetric analysis (TGA) was obtained on a TGA Q50 instrument under nitrogen at heating rate of 10°C/min from 25 to 800°C. We calculated the sulfonyl group substitution to poly(ether sulfone) through derivative thermogravimetric curves considering that the weight loss before 600°C of the SPES derivatives was related to the substituted groups; it was found to be 37% sulfonation 13. Morphological aspects of the blend compositions film were evaluated by scanning electron microscopy (SEM; JEOL JSM‐6380).…”

Section: Methodsmentioning

confidence: 99%

Molecular composites created by the solution blending of polyaniline and sulfonated poly(ether sulfone)

Kanhegaokar

Gao

Choi

et al. 2010

J of Applied Polymer Sci

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New conducting thermally stable blends of polyaniline (PANi) with sulfonated poly(ether sulfone) as a matrix were prepared by a solution-blending method. Camphorsulfonic acid (CSA) was used as a protonic agent for PANi. A sulfonyl group was introduced into the poly(ether sulfone) to enhance the coulomb interaction among the blends. The influence of the sulfonated group in poly(ether sulfone) was monitored with electrical property measurements. Ultraviolet-visible spectra of the blend compositions showed a well-developed polaron band. The compatibility of the blends, that is, hydrogen bonding and dispersion at the molecular level, was ascertained with X-ray diffraction and Fourier transform infrared (FTIR) spectroscopy; these supported intermolecular interaction. A smooth and uniform morphology was observed in the blends. The electrical conductivity of the blends increased up to 14 S/cm with the protonation of the PANi complex with CSA, and the percolation threshold was found to be 2 wt % PANi. These new blends showed increases in conductivity and compatibility over other PANi-poly(ether sulfone) blends.

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“…The antimicrobial properties of benzophenone incorporated materials have been studied but not in the case of SPEEK‐based polymer blends. SPEEK has been, however, blended (in solution) with polymers such as polyvinyl alcohol (PVA) and polyvinyl butyral (PVB) to be used as a direct methanol fuel cell (DMFC), metal reduction material and for the production of functional thermoplastic materials such as advanced composites . On the contrary, the idea to mechanically compound SPEEK with a polyolefin is rather new.…”

Section: Introductionmentioning

confidence: 99%

Sulfonated polyetheretherketone/polypropylene polymer blends for the production of photoactive materials

Fatarella

Mylläri

Ruzzante

et al. 2014

J of Applied Polymer Sci

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Sulfonated polyetheretherketone (SPEEK) was synthesized via a mono-substitution reaction of PEEK in concentrated sulphuric\ud acid and was blended with polypropylene (PP) in 2–10%w/w concentration to be used for the production of photoactive thermoplastic\ud products. SPEEK and SPEEK/PP blends were characterized using FTIR, DSC, TGA, NMR, rheology, SEM, and EPR. Under\ud UV-Vis irradiation, stable benzophenone ketyl (BPK) radicals were generated by hydrogen extraction from PP. By increasing the\ud amount of SPEEK in the polymer blend a linear increase in the BPK radicals was achieved according to the EPR data. DSC and TGA\ud tests indicated weaknesses in the thermal stability of SPEEK but according to the rheological tests this should not have a major effect\ud on processabililty. The optimal amount of SPEEK in the blend was obtained at 5%w/w. This concentration provided a good compromise\ud between radical concentration, material processability, and cost

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Poly (ether ether ketone) derivatives: Synthetic route and characterization of nitrated and sulfonated polymers

Cited by 19 publications

References 18 publications

Crosslinked chitosan/poly (vinyl alcohol) blends with proton conductivity characteristic

Crosslinked chitosan/poly (vinyl alcohol) blends with proton conductivity characteristic

Molecular composites created by the solution blending of polyaniline and sulfonated poly(ether sulfone)

Sulfonated polyetheretherketone/polypropylene polymer blends for the production of photoactive materials

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