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The effect of epoxy excess on the kinetics of an epoxy–anhydride system
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| Zeitschriftentitel: | Journal of Applied Polymer Science |
|---|---|
| Personen und Körperschaften: | , |
| In: | Journal of Applied Polymer Science, 85, 2002, 11, S. 2342-2349 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
|
| Schlagwörter: |
| author_facet |
Mauri, A. N. Riccardi, C. C. Mauri, A. N. Riccardi, C. C. |
|---|---|
| author |
Mauri, A. N. Riccardi, C. C. |
| spellingShingle |
Mauri, A. N. Riccardi, C. C. Journal of Applied Polymer Science The effect of epoxy excess on the kinetics of an epoxy–anhydride system Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry |
| author_sort |
mauri, a. n. |
| spelling |
Mauri, A. N. Riccardi, C. C. 0021-8995 1097-4628 Wiley Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry http://dx.doi.org/10.1002/app.10867 <jats:title>Abstract</jats:title><jats:p>The uncatalyzed cure of a commercial tetrafunctional epoxy monomer TGDDM (<jats:italic>N,N,N</jats:italic>′,<jats:italic>N</jats:italic>′‐tetraglycidyl‐4,4′‐diaminodiphenylmethane) with hexahydrophthalic anhydride (HHPA), using variable stoichiometric ratios is reported. The reaction was followed by differential scanning calorimetry (DSC). Two kinds of experiments were performed: (1) fresh samples were run at several heating rates, and (2) samples, precured a certain time in an oil bath at constant temperature (i.e., 80 to 120°C), were run at 10°C/min. Two peaks were observed in the case of the epoxy excess but only one for the stoichiometric formulation: the peak at low temperature was attributed to the epoxy copolymerization with the anhydride while the peak at high temperature was attributed to the epoxy homopolymerization. The catalytic effect of the OH groups present in the epoxy monomer on the copolymerization reaction was demonstrated by the decrease in the activation energy of the propagation step when increasing the epoxy excess. There is a catalytic effect of the copolymerization product on the homopolymerization reaction. Our simplest model, proposed previously for a catalyzed epoxy/anhydride system [<jats:italic>J. Polym. Sci. Part B: Polym. Phys. Ed.,</jats:italic> 37, 2799 (1999)], can be used to fit both isothermal and dynamical kinetic data. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2342–2349, 2002</jats:p> The effect of epoxy excess on the kinetics of an epoxy–anhydride system Journal of Applied Polymer Science |
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| title |
The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_unstemmed |
The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_full |
The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_fullStr |
The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_full_unstemmed |
The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_short |
The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_sort |
the effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| topic |
Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry |
| url |
http://dx.doi.org/10.1002/app.10867 |
| publishDate |
2002 |
| physical |
2342-2349 |
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<jats:title>Abstract</jats:title><jats:p>The uncatalyzed cure of a commercial tetrafunctional epoxy monomer TGDDM (<jats:italic>N,N,N</jats:italic>′,<jats:italic>N</jats:italic>′‐tetraglycidyl‐4,4′‐diaminodiphenylmethane) with hexahydrophthalic anhydride (HHPA), using variable stoichiometric ratios is reported. The reaction was followed by differential scanning calorimetry (DSC). Two kinds of experiments were performed: (1) fresh samples were run at several heating rates, and (2) samples, precured a certain time in an oil bath at constant temperature (i.e., 80 to 120°C), were run at 10°C/min. Two peaks were observed in the case of the epoxy excess but only one for the stoichiometric formulation: the peak at low temperature was attributed to the epoxy copolymerization with the anhydride while the peak at high temperature was attributed to the epoxy homopolymerization. The catalytic effect of the OH groups present in the epoxy monomer on the copolymerization reaction was demonstrated by the decrease in the activation energy of the propagation step when increasing the epoxy excess. There is a catalytic effect of the copolymerization product on the homopolymerization reaction. Our simplest model, proposed previously for a catalyzed epoxy/anhydride system [<jats:italic>J. Polym. Sci. Part B: Polym. Phys. Ed.,</jats:italic> 37, 2799 (1999)], can be used to fit both isothermal and dynamical kinetic data. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2342–2349, 2002</jats:p> |
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| author | Mauri, A. N., Riccardi, C. C. |
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| author_sort | mauri, a. n. |
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| description | <jats:title>Abstract</jats:title><jats:p>The uncatalyzed cure of a commercial tetrafunctional epoxy monomer TGDDM (<jats:italic>N,N,N</jats:italic>′,<jats:italic>N</jats:italic>′‐tetraglycidyl‐4,4′‐diaminodiphenylmethane) with hexahydrophthalic anhydride (HHPA), using variable stoichiometric ratios is reported. The reaction was followed by differential scanning calorimetry (DSC). Two kinds of experiments were performed: (1) fresh samples were run at several heating rates, and (2) samples, precured a certain time in an oil bath at constant temperature (i.e., 80 to 120°C), were run at 10°C/min. Two peaks were observed in the case of the epoxy excess but only one for the stoichiometric formulation: the peak at low temperature was attributed to the epoxy copolymerization with the anhydride while the peak at high temperature was attributed to the epoxy homopolymerization. The catalytic effect of the OH groups present in the epoxy monomer on the copolymerization reaction was demonstrated by the decrease in the activation energy of the propagation step when increasing the epoxy excess. There is a catalytic effect of the copolymerization product on the homopolymerization reaction. Our simplest model, proposed previously for a catalyzed epoxy/anhydride system [<jats:italic>J. Polym. Sci. Part B: Polym. Phys. Ed.,</jats:italic> 37, 2799 (1999)], can be used to fit both isothermal and dynamical kinetic data. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2342–2349, 2002</jats:p> |
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| spelling | Mauri, A. N. Riccardi, C. C. 0021-8995 1097-4628 Wiley Materials Chemistry Polymers and Plastics Surfaces, Coatings and Films General Chemistry http://dx.doi.org/10.1002/app.10867 <jats:title>Abstract</jats:title><jats:p>The uncatalyzed cure of a commercial tetrafunctional epoxy monomer TGDDM (<jats:italic>N,N,N</jats:italic>′,<jats:italic>N</jats:italic>′‐tetraglycidyl‐4,4′‐diaminodiphenylmethane) with hexahydrophthalic anhydride (HHPA), using variable stoichiometric ratios is reported. The reaction was followed by differential scanning calorimetry (DSC). Two kinds of experiments were performed: (1) fresh samples were run at several heating rates, and (2) samples, precured a certain time in an oil bath at constant temperature (i.e., 80 to 120°C), were run at 10°C/min. Two peaks were observed in the case of the epoxy excess but only one for the stoichiometric formulation: the peak at low temperature was attributed to the epoxy copolymerization with the anhydride while the peak at high temperature was attributed to the epoxy homopolymerization. The catalytic effect of the OH groups present in the epoxy monomer on the copolymerization reaction was demonstrated by the decrease in the activation energy of the propagation step when increasing the epoxy excess. There is a catalytic effect of the copolymerization product on the homopolymerization reaction. Our simplest model, proposed previously for a catalyzed epoxy/anhydride system [<jats:italic>J. Polym. Sci. Part B: Polym. Phys. Ed.,</jats:italic> 37, 2799 (1999)], can be used to fit both isothermal and dynamical kinetic data. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 2342–2349, 2002</jats:p> The effect of epoxy excess on the kinetics of an epoxy–anhydride system Journal of Applied Polymer Science |
| spellingShingle | Mauri, A. N., Riccardi, C. C., Journal of Applied Polymer Science, The effect of epoxy excess on the kinetics of an epoxy–anhydride system, Materials Chemistry, Polymers and Plastics, Surfaces, Coatings and Films, General Chemistry |
| title | The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_full | The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_fullStr | The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_full_unstemmed | The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_short | The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_sort | the effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| title_unstemmed | The effect of epoxy excess on the kinetics of an epoxy–anhydride system |
| topic | Materials Chemistry, Polymers and Plastics, Surfaces, Coatings and Films, General Chemistry |
| url | http://dx.doi.org/10.1002/app.10867 |