Optimization of the operative conditions for heteropolyacids synthesis through ion exchange

Matkovic, Silvana R.; Valle, Graciela M.; Briand, Laura E.

doi:10.1590/s1516-14392005000300022

Cited by 11 publications

(10 citation statements)

References 15 publications

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“…Apart from the abovementioned qualitative applications, FTIR spectrophotometry has proved useful in quantitative determinations. For example, quantitative application of FTIR spectrophotometer in i b u p r o f e n in pharmaceutical f o r m u l a t i o n s 25 , g y p s u m r a w materials 26 , OH populations in mineral grains 27 , moisture in lubricants 28 and characterisation of polymer structure 29 . In 2002, Maillard et al reported the application of FTIR spectroscopy in the quantitative ester determination of ester functionalised polyolefi ns [30][31][32] followed by Anbarasan and co-workers [33][34] , who worked on thioester-functionalised HDPE.…”

Section: Resultsmentioning

confidence: 99%

Ftir Spectroscopy: A Useful Tool for Structural Determination of Polyaniline and its Nanocomposites

Arasi¹,

Jeyakumari²,

Sundaresan³

et al. 2009

Polymers and Polymer Composites

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Poly(aniline) nanocomposites were obtained by polymerisation under various experimental conditions including variation of time, temperature, monomer and concentration of initiators. The ratios of imino and amino units were estimated and correlated the with polyaniline (PANI) structure. Rates of polymerisation (Rp) values were estimated by a gravimetric method. TGA counsels the thermal stability of PANI. Through FTIR study, the structure of PANI/As2O3 nanocomposites was recognised. Comparison of polyanilines produced with two different initiators was done.

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Section: Resultsmentioning

confidence: 99%

Ftir Spectroscopy: A Useful Tool for Structural Determination of Polyaniline and its Nanocomposites

Arasi¹,

Jeyakumari²,

Sundaresan³

et al. 2009

Polymers and Polymer Composites

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“…Moreover, this method is easy and inexpensive one. FTIR spectroscopy is used in both qualitative [16][17][18][19][20][21] and quantitative [22][23][24][25][26][27][28][29][30][31][32] applications. The above literature survey indicates that FTIR kinetic reports on functionalization of LLDPE with metal salts are not available.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterizations of calcium di(meth)acrylate divinyl monomers and melt surface graft functionalization with linear low density poly(ethylene)

Anbarasan

Dhanalakshmi²,

Rajasulochana³

et al. 2009

J of Applied Polymer Sci

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Calcium diacrylate (CDA) and calcium dimethacrylate (CDM) divinyl monomers were synthesized by a solvo thermal method. The FTIR spectra showed a peak at 1650 cm À1 due to the presence of a C¼ ¼C for both CDA and CDM. Proton NMR and carbon NMR confirmed the structure of CDA and CDM synthesized by a solvo thermal method. DSC determined the melting temperatures of CDA and CDM. XRD indicated the presence of a d 110 plane peak for CDA and CDM. The % weight residue that remained above 700 C in TGA method confirmed the higher thermal stability of CDA.Thus, synthesized CDA and CDM were surface grafted on linear low density poly(ethylene) (LLDPE) at 160 C under inert atmosphere by thermolysis method. FTIR confirmed the presence of C¼ ¼O stretching due to CDA and CDM in LLDPE backbone after thermolysis reaction.1 H-NMR confirmed the chemical grafting of CDM onto LLDPE.

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“…Potassium salt of Dawson K 6 [P 2 W 18 O 62 ] was synthesized according to literature reports [28,29]. Dawson acid (Dawson, H 6 [P 2 W 18 O 62 ]) was prepared by passage of aqueous solution of potassium salt through a cation exchange resin column (Dowex50w 9 8) and evaporation of the solution.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Investigation of linear alkylbenzene synthesis using nanotitania-supported Dawson heteropolyacid as catalyst by statistical design approaches

et al. 2015

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Alkylation of benzene with 1-decene for production of linear alkylbenzene in the presence of nanotitania (n-TiO 2 )-supported Dawson heteropolyacids was studied. Various operating parameters including benzene to 1-decene molar ratio, catalyst weight percent (wt%), catalyst loading (wt%), calcination temperature, reaction time, and temperature influenced the reaction yield. Fractional factorial design was employed to screen these parameters, and significant parameters modeled by a central composite design. Finally, the best conditions were defined by using nonlinear Nelder-Mead optimization to reach maximum reaction yield.

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Optimization of the operative conditions for heteropolyacids synthesis through ion exchange

Cited by 11 publications

References 15 publications

Ftir Spectroscopy: A Useful Tool for Structural Determination of Polyaniline and its Nanocomposites

Ftir Spectroscopy: A Useful Tool for Structural Determination of Polyaniline and its Nanocomposites

Synthesis and characterizations of calcium di(meth)acrylate divinyl monomers and melt surface graft functionalization with linear low density poly(ethylene)

Investigation of linear alkylbenzene synthesis using nanotitania-supported Dawson heteropolyacid as catalyst by statistical design approaches

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