DOI: 10.1002/polb.10147. Probing the molecular interactions in the diffusion of water through epoxy and epoxy

Probing the molecular interactions in the diffusion of water through epoxy and epoxy–bismaleimide networks

10.1002/polb.10147

Crossref journal-article

Wiley

Journal of Polymer Science Part B: Polymer Physics (311)

Abstract

AbstractFourier transform infrared spectroscopy in the near‐infrared (NIR) frequency range was used to investigate the molecular interactions occurring between absorbed water molecules and networks based on a tetrafunctional epoxy resin. One of these networks was a typical formulation containing 4,4′‐diamino diphenylsulfone as a hardener, and the other was a modified resin containing 4,4′‐bismaleimide‐diphenylmethane (BMI) as a coreactive monomer. Molecular spectroscopy analysis confirmed the existence of mobile water localized into network defects (microvoids) that did not interact with the networks and water molecules bound to the networks through hydrogen‐bonding interactions. In the BMI‐containing system, the fraction of bound water decreased significantly with respect to the unmodified epoxy resin. This was a relevant result because the bound water was primarily responsible for the plasticization of the network and for the consequent worsening of mechanical performance. Water diffusion was investigated with gravimetric sorption measurements and time‐resolved Fourier transform NIR spectroscopy measurements. These showed that the presence of BMI decreased the water uptake at equilibrium, enhanced the diffusivity, and reduced the activation energy for diffusion. A dual‐mode model for diffusion was found to be suitable for accurately describing the mass‐transport process in both investigated systems. The results of the model simulations allowed us to estimate the ratio of free and bound water, which was in good agreement with that obtained from the spectroscopic analysis. © 2002 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 40: 922–938, 2002

Bibliography

Musto, P., Ragosta, G., Scarinzi, G., & Mascia, L. (2002). Probing the molecular interactions in the diffusion of water through epoxy and epoxyâbismaleimide networks. Journal of Polymer Science Part B: Polymer Physics, 40(10), 922â938. Portico.

Authors 4

Pellegrino Musto (first)
Giuseppe Ragosta (additional)
Gennaro Scarinzi (additional)
Leno Mascia (additional)

References 32 Referenced 76

{'key': 'e_1_2_5_2_2', 'volume-title': 'Handbook of Epoxy Resins', 'author': 'Lee H.', 'year': '1990'} / Handbook of Epoxy Resins by Lee H. (1990)
{'key': 'e_1_2_5_3_2', 'first-page': '519', 'volume-title': 'Encyclopaedia of Polymer Science and Technology', 'author': 'Gillham J. K.', 'year': '1986'} / Encyclopaedia of Polymer Science and Technology by Gillham J. K. (1986)
{'key': 'e_1_2_5_4_2', 'volume-title': 'Epoxy Resins, Chemistry and Technology', 'author': 'May C. A.', 'year': '1988'} / Epoxy Resins, Chemistry and Technology by May C. A. (1988)
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{'key': 'e_1_2_5_13_2', 'first-page': '657', 'volume': '1', 'author': 'Pigneri A. M.', 'year': '1987', 'journal-title': 'Int SAMPE Electron Conf'} / Int SAMPE Electron Conf by Pigneri A. M. (1987)
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{'key': 'e_1_2_5_24_2', 'volume-title': 'Water: The Physics and Physical Chemistry of Water', 'author': 'Walrafen W. F.', 'year': '1972'} / Water: The Physics and Physical Chemistry of Water by Walrafen W. F. (1972)
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Dates

Type	When
Created	23 years ago (Aug. 25, 2002, 7:44 p.m.)
Deposited	1 year, 10 months ago (Oct. 16, 2023, 1:58 a.m.)
Indexed	1 year, 1 month ago (July 20, 2024, 3:10 a.m.)
Issued	23 years, 5 months ago (March 18, 2002)
Published	23 years, 5 months ago (March 18, 2002)
Published Online	23 years, 5 months ago (March 18, 2002)
Published Print	23 years, 3 months ago (May 15, 2002)

Funders 0

None

BibTeX

@article{Musto_2002, title={Probing the molecular interactions in the diffusion of water through epoxy and epoxy–bismaleimide networks}, volume={40}, ISSN={1099-0488}, url={http://dx.doi.org/10.1002/polb.10147}, DOI={10.1002/polb.10147}, number={10}, journal={Journal of Polymer Science Part B: Polymer Physics}, publisher={Wiley}, author={Musto, Pellegrino and Ragosta, Giuseppe and Scarinzi, Gennaro and Mascia, Leno}, year={2002}, month=mar, pages={922–938} }

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