The Málek method in the kinetic study of polymerization by differential scanning calorimetry

Sbirrazzuoli, Nicolas; Girault, Y.; Elegant, L.

doi:10.1016/0040-6031(95)90690-8

Cited by 32 publications

(13 citation statements)

References 13 publications

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“…(8)- (10), m tends to decrease in the order of DGEBA/PB4 < DGEBA/PB2 < DGEBA/EDA-dendri-(NH 2 ) 4 , whereas n changes slightly, which quite resembles the case of the nonisothermal reactions of a partially reacted epoxy/anhydride system [38]. In some sense, this likely reflects that the reaction becomes less autocatalytic and tends to follow a single mechanism [39] as the number of the BGE moieties increases. Two main reasons could account for this finding.…”

Section: Rate Equationsmentioning

confidence: 78%

Learning about novel amine-adduct curing agents for epoxy resins: Butyl-glycidylether-modified poly(propyleneimine) dendrimers

Wan

et al. 2011

Thermochimica Acta

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Section: Rate Equationsmentioning

confidence: 78%

Learning about novel amine-adduct curing agents for epoxy resins: Butyl-glycidylether-modified poly(propyleneimine) dendrimers

Wan

et al. 2011

Thermochimica Acta

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“…These equations are used to obtain the master curves as a function of the reaction degree corresponding to the different models listed in [32][33][34][35][36][37].…”

Section: Kinetic Model Of Thermal Degradationmentioning

confidence: 99%

Thermal degradation kinetics of PET/SWCNTs nanocomposites prepared by the in situ polymerization

Pilawka

Paszkiewicz

Rosłaniec

2013

J Therm Anal Calorim

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The decomposition and thermal behavior of poly(ethylene terephthalate) (PET)/carbon nanotubes (CNTs) nanocomposites were studied using thermogravimetric (TG) analysis in air atmosphere. A series of PET/ single-walled CNTs (SWCNTs) materials of varying nanoparticles concentration were prepared using the in situ polymerization technique. Transmission electron microscopy and scanning electron microscopy micrographs verified that the dispersion of the SWCNTs in the PET matrix was homogeneous, while some relatively small aggregates co-existed at higher filler concentration. Two-stage decomposition was observed in the experiments. During first stage, strong chemical bonds are broken, i.e., aliphatic bonds and benzyl ring containing molecules decompose into small molecules in the gaseous phase. During second stage, when temperature is higher, the remaining nanotubes along with the residues of the first stage are burned. 10,20, ) methods were applied to TG data to obtain kinetic parameters (activation energy, Arrhenius constant at 600 K and A factor) and Criado method to kinetics model analysis. In this kinetic model, energy activation is increasing with the increase of nanotubes concentration.

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“…[5][6][7][8][9] Differential scanning calorimetry (DSC), both in the scanning and non-isothermal modes, has been used extensively in this manner. [10][11][12][13][14] This paper reports the mechanical properties of C 21 diacid-based polyamides from tung oil curing DGEBA and curing kinetics based on non-isothermal DSC measurements, applying the simple and consistent method of Málek [15][16][17][18][19][20] to the kinetic analysis of data obtained by thermal treatment.…”

Section: Introductionmentioning

confidence: 99%

Properties and curing kinetics of C21-based reactive polyamides as epoxy-curing agents derived from tung oil

Huang

Xia

Yang

et al. 2010

Polym J

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Three C 21 -based reactive polyamides were synthesized from tung oil and different polyamines. The thermal and mechanical properties of cured products of the C 21 -based polyamides and diglycidyl ether of bisphenol A (DGEBA) were investigated. It was found that the cured materials were superior to those cured by C 36 -based polyamides in tensile strength and flexural strength and had a better flexural modulus. The glass transition temperatures of the three cured C 21 -based polyamides, determined by differential scanning calorimetry (DSC), were found to be 108, 109 and 116 1C, which were also higher than those of C 36 -based polyamides. The curing kinetics of C 21 -based polyamides in the presence of DGEBA were studied by nonisothermal DSC at different heating rates. The kinetic parameters of the curing process were determined by the iso-conversional method given by Má lek. A two-parameter (m, n) autocatalytic model (the Š está k-Berggren equation) was found to be the most suitable to describe the curing kinetics of the studied curing agents. The activation energy (E a ) values of the three curing agents with DGEBA are dependent on the amine values of polyamides. The E a value of the curing reaction decreased as the primary amine values of curing agents increased. The experimental non-isothermal DSC curves show a good agreement with theoretical calculations.

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The Málek method in the kinetic study of polymerization by differential scanning calorimetry

Cited by 32 publications

References 13 publications

Learning about novel amine-adduct curing agents for epoxy resins: Butyl-glycidylether-modified poly(propyleneimine) dendrimers

Learning about novel amine-adduct curing agents for epoxy resins: Butyl-glycidylether-modified poly(propyleneimine) dendrimers

Thermal degradation kinetics of PET/SWCNTs nanocomposites prepared by the in situ polymerization

Properties and curing kinetics of C21-based reactive polyamides as epoxy-curing agents derived from tung oil

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