Physical aging studies in epoxy resins. I. Kinetics of the enthalpy relaxation process in a fully cured epoxy resin

The relaxation behaviors of PS below Tg and its variation trend along with aging time were studied by DSC, fluorescence spectrum and XRD. On the basis of DSC results, the kinetics of the volume and enthalpy relaxation process were analyzed, and the influence of the aging time on the relaxation behaviors were discussed. The results of fluorescence spectrum and XRD indicated the presence of the rearrangement of polymer chains in the physical aging of polystyrene.

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Kinetics of the enthalpy relaxation process for an epoxy network as determined with a peak shift model

Journal of Applied Polymer Science ◽

10.1002/app.22377 ◽

2005 ◽

Vol 98 (5) ◽

pp. 2003-2008 ◽

Cited By ~ 1

Author(s):

F. Fraga ◽

C. Castro-Díaz ◽

E. Rodríguez-Núñez ◽

J. M. Martínez-Ageitos

Keyword(s):

Relaxation Process ◽

Peak Shift ◽

Enthalpy Relaxation ◽

Epoxy Network ◽

Shift Model ◽

Kinetics Of

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Physical aging studies in polymer blends. 2. Enthalpy relaxation as a function of aging temperature in a poly(vinyl methyl ether)/polystyrene blend

Macromolecules ◽

10.1021/ma00195a054 ◽

1989 ◽

Vol 22 (5) ◽

pp. 2312-2317 ◽

Cited By ~ 55

Author(s):

John M. G. Cowie ◽

Roderick Ferguson

Keyword(s):

Polymer Blends ◽

Methyl Ether ◽

Aging Temperature ◽

Physical Aging ◽

Enthalpy Relaxation ◽

Vinyl Methyl ◽

Vinyl Methyl Ether ◽

Aging Studies

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Correction to: Physical aging of multilayer polymer films—influence of layer thickness on enthalpy relaxation process, effect of confinement

Journal of Polymer Research ◽

10.1007/s10965-021-02862-x ◽

2021 ◽

Vol 29 (1) ◽

Author(s):

Khadidja Arabeche ◽

Laurent Delbreilh ◽

Eric Baer

Keyword(s):

Relaxation Process ◽

Layer Thickness ◽

Polymer Films ◽

Physical Aging ◽

Enthalpy Relaxation

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Decomposition mechanisms and kinetics of amine/anhydride-cured DGEBA epoxy resin in near-critical water

RSC Advances ◽

10.1039/c5ra03828f ◽

2015 ◽

Vol 5 (50) ◽

pp. 40269-40282 ◽

Cited By ~ 8

Author(s):

Xianyun Gong ◽

Hongjun Kang ◽

Yuyan Liu ◽

Songquan Wu

Keyword(s):

Reaction Mechanism ◽

Epoxy Resin ◽

Epoxy Resins ◽

Decomposition Mechanisms ◽

Observed Information ◽

Kinetics Of

A reaction mechanism based on the homolysis of the bonds of epoxy resins system in near-critical water was discussed. Based on the observed information, a probable macroscopic mechanism was proposed.

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An improved simplified approach for curing kinetics of epoxy resins by nonisothermal differential scanning calorimetry

High Performance Polymers ◽

10.1177/0954008317693291 ◽

2017 ◽

Vol 30 (3) ◽

pp. 303-311 ◽

Cited By ~ 4

Author(s):

Chao Chen ◽

Yanxia Li ◽

Yizhuo Gu ◽

Min Li ◽

Zuoguang Zhang

Keyword(s):

Differential Scanning Calorimetry ◽

Epoxy Resin ◽

Kinetic Parameters ◽

Epoxy Resins ◽

Curing Kinetics ◽

Scanning Calorimetry ◽

Simplified Approach ◽

Curing Kinetic ◽

Autocatalytic Curing ◽

Kinetics Of

The curing kinetics of two different types of commercial epoxy resins were investigated by means of nonisothermal differential scanning calorimetry (DSC) in this work. The complex curve of measured heat flow of CYCOM 970 epoxy resin was simplified with the method of resolution of peak. Two typical autocatalytic curing reaction curves were gained and the kinetic parameters of the curing process were demonstrated by combination of those two reactions. The Kissinger method was adopted to obtain the values of the activation energy. The parameters of curing kinetic model were acquired according to the fitting of Kamal model. Isothermal DSC curve of CYCOM 970 epoxy resin obtained using the experimental data shows a good agreement with that theoretically calculated. Then, 603 epoxy resin was investigated by the simplified method and the kinetic parameters were received through the same procedure. The nonisothermal DSC curve tested according to the recommended cure cycle of 603 epoxy resin is also consistent with the calculated results. This improved simplified approach provides an effective method to analyze the curing kinetics of the epoxy resins with complex DSC curves as similar to this study.

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Kinetics of Enthalpy Relaxation upon Physical Aging in Poly (ethylene terephthalate)

Nihon Reoroji Gakkaishi ◽

10.1678/rheology1973.23.3_131 ◽

1995 ◽

Vol 23 (3) ◽

pp. 131-137 ◽

Cited By ~ 4

Author(s):

Kuniyoshi ITOYAMA

Keyword(s):

Ethylene Terephthalate ◽

Physical Aging ◽

Enthalpy Relaxation ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene ◽

Kinetics Of

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Kinetic Studies on Epoxy Resins Cured with a Novel Polyamine

High Performance Polymers ◽

10.1088/0954-0083/4/1/005 ◽

1992 ◽

Vol 4 (1) ◽

pp. 41-48 ◽

Cited By ~ 2

Author(s):

R. M. V. G. K. Rao ◽

A. Padma ◽

H. S. Patel

Keyword(s):

Activation Energy ◽

Epoxy Resin ◽

Epoxy Resins ◽

Kinetic Studies ◽

Cure Kinetics ◽

Curing Process ◽

Kinetics Of

Differential scanning calorimeny was used to study the cure kinetics of three epoxy resin systems cured with two hardeners: diaminodiphenylmethane (DDM) and a poly (keto-amine) (PA). The results showved that the curing of the epoxy resins by PA occurs at higher temperatures and the activation energy for PA curing was higher compared with the DDM curing process, showing the er reactivity of PA.

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