Kinetics of epoxy resin synthesis on the basis of GPC measurements

Antal, L.; Füzes, L.; Samay, G.; Csillag, L.

doi:10.1002/app.1981.070260827

Cited by 9 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies only considered the influence of the epoxide concentration on the reaction rate. Even if BA or TBBA were the limiting reactant, , the influence of phenolic groups on the reaction rate was never explored.…”

Section: Resultsmentioning

confidence: 99%

“…The analysis of the DGEBA/TBBA reaction process is thus concerned with two problems: the kinetics of the main reaction process and the influence of secondary reactions. Although kinetic data are reported in the literature for the DGEBA/bisphenol A (BA) reaction, , less information is available on the reaction of tetrabromobisphenol A with DGEBA. Previous studies mainly investigated the reaction mechanism and catalyst selectivity but did not explore the thermal effects of the reaction and the reaction kinetics dependence on the catalyst concentration and reactant ratio.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Calorimetric and Kinetic Analysis of the Diglycidyl Ether of the Bisphenol A/Tetrabromobisphenol A Reaction for the Production of Linear Brominated Epoxy Resins

Barontini¹,

Cozzani

Petarca

2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The reaction process of diglycidyl ether of bisphenol A (DGEBA) with tetrabromobisphenol A (TBBA) to yield linear brominated epoxy resins was studied by calorimetric techniques and quantitative IR analysis. A wide range of DGEBA/TBBA molar ratios and of catalyst concentrations was investigated, including those typical of industrial processes. The study was focused on the thermal effects and overall reaction kinetics of the DGEBA/TBBA linear polymerization process. The influence of secondary reactions was proven to be negligible under the experimental conditions considered. The kinetic parameters of the reaction process were evaluated by an Arrhenius single-step model. The kinetic and calorimetric parameters estimated may be used for a preliminary indication of process conversions and reaction rates and for the safety analysis of the DGEBA/TBBA industrial reaction processes.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Calorimetric and Kinetic Analysis of the Diglycidyl Ether of the Bisphenol A/Tetrabromobisphenol A Reaction for the Production of Linear Brominated Epoxy Resins

Barontini¹,

Cozzani

Petarca

2000

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Reaction monitoring of epoxy resin formation was carried out by several investigators through the quantification of desired product only, and the quantification is mostly based on molecular weight determination using gel permeation chromatography 12–15. Moreover, above studies did not account (i) the variation of process conditions (e.g., polymerization temperature, alkali concentration, and molar ratio of EP to BPA), and (ii) the estimation of the side products during polymerization.…”

Section: Introductionmentioning

confidence: 99%

Rapid monitoring of bisphenol‒A diglycidyl ether formation through byproduct estimation: A study by Fourier transform infra‐red spectroscopy

Sreenadhan

Guria

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

For identification and quantification of desired and undesired products during epoxy resin formation, polymerization of bisphenol-A with the stoichiometric excess of epichlorohydrin is carried out using catalytic excess of alkali. The reaction is monitored using Fourier transform infra-red (FT-IR) spectroscopy technique. Major undesired products are unreacted monomers (bisphenol-A and epichlorohydrin) and byproducts (chlorine and a-glycol substituted diglycidal ether of bisphenol-A), whereas the desired product is only diglycidal ether of bisphenol-A. Molar concentrations of epichlorohydrin, bisphenol-A, diglycidal ether of bisphenol-A, chlorine substituted resin, and a-glycol substituted resin in the polymerization mixture are analyzed and quantified using FT-IR characteristic frequency bands at 925, 3448, 1344, 773, and 3641 cm À1 , respectively. For optimal determination of process parameters on polymerization, effect of temperature and alkali loading on epoxy polymerization is carried to maximize the yield of diglycidal ether of bisphenol-A with simultaneous minimizing the byproducts formation.

show abstract

Etude des prépolymères époxydes par chromatographie et ¹H NMR à 350 MHz

et al. 1983

View full text Add to dashboard Cite

The epoxy resins (DGEBA) obtained from 4,4'-isopropylidendiphenol (bisphenol A) and 1 -chloru-2,3-epoxypropane (epichlorohydrin) and synthetized by the "taffy" process were found to consist of oligomers. The composition of prepolymers could be deduced from gel permeation chromatography (GPC), and particularly by high pressure liquid chromatography (HPLC). In the more resolved HPLC spectrum each oligomer was found to be accompanied by satellite: peaks. The functionality of the prepolymers, determined by 'H NMR spectroscopy and cryometric or vapour pressure osmometric measurements was found to be less than two. These phenomena are due to the existence of abnormal chain ends having no epoxy group. The structure of the main components separated by preparative GPC was studied by 'H NMR. For the impurities, the two identified structures of chain ends are primary and secondary alcohol functions. Finally the compositions of three DGEBA were determined.

show abstract

Kinetics of epoxy resin synthesis on the basis of GPC measurements

Cited by 9 publications

References 0 publications

Calorimetric and Kinetic Analysis of the Diglycidyl Ether of the Bisphenol A/Tetrabromobisphenol A Reaction for the Production of Linear Brominated Epoxy Resins

Calorimetric and Kinetic Analysis of the Diglycidyl Ether of the Bisphenol A/Tetrabromobisphenol A Reaction for the Production of Linear Brominated Epoxy Resins

Rapid monitoring of bisphenol‒A diglycidyl ether formation through byproduct estimation: A study by Fourier transform infra‐red spectroscopy

Etude des prépolymères époxydes par chromatographie et ¹H NMR à 350 MHz

Contact Info

Product

Resources

About

Kinetics of epoxy resin synthesis on the basis of GPC measurements

Cited by 9 publications

References 0 publications

Calorimetric and Kinetic Analysis of the Diglycidyl Ether of the Bisphenol A/Tetrabromobisphenol A Reaction for the Production of Linear Brominated Epoxy Resins

Calorimetric and Kinetic Analysis of the Diglycidyl Ether of the Bisphenol A/Tetrabromobisphenol A Reaction for the Production of Linear Brominated Epoxy Resins

Rapid monitoring of bisphenol‒A diglycidyl ether formation through byproduct estimation: A study by Fourier transform infra‐red spectroscopy

Etude des prépolymères époxydes par chromatographie et 1H NMR à 350 MHz

Contact Info

Product

Resources

About

Etude des prépolymères époxydes par chromatographie et ¹H NMR à 350 MHz