Abstract
A series of polyurethane/epoxy resin interpenetrating polymer networks (PU/ER IPN) were studied by positron annihilation lifetime spectroscopy (PALS). The effects of epoxy resin type and content on the free volume properties in IPN were investigated. We found that in PU/ER IPN, the free volume hole size and fractional free volume showed a negative deviation due to closer segmental chain packing through some chemical bonding between PU and epoxy resin. Direct relationship between the gas permeability and the free volume has been established based on the free volume theory. Experimental results revealed that the free volume plays an important role in determining the gas diffusion and permeability.
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References
Sperling L H. Interpenetrating Polymer Networksand Related Materials [M]. New York: Plenum Press, 1981: 121–151.
May C A. Epoxy Resin Chemistry and Tecnology [M]. New York: Marcel Dekker, 1988: 132–145.
Sperling L H. Recent Advances in Interpenetrating Polymer Networks [J]. Polym Eng Sci, 1985, 25: 517–520.
Frisch K C, Klempner D, Mukherjee S K. Stress-Strain Properties and Thermal-Resistance of Polyurethane-Polyepoxide Interpenetrating Polymer Networks [J]. J Appl. Polym Sci, 1974, 18: 689–693.
Hsieh K H, Chiang Y C, Chern Y C, et al. Interpenetrating Polymer Network of Polyurethane and Epoxy I Mechanical Behavior [J]. Angew Makromol Chem, 1991, 193: 89–98.
Jean Y C, Yuan J P, Liu J, et al. Correlations between Gas Permeation and Free-Volume Hole Properties Probed by Positron Annihilation Spectroscopy [J]. J Polym Sci, Part B: Polym Phys, 1995, 33: 2365–2371.
Cohen M H, Turnbull D. Molecular Transport in Liquids and Glasses [J]. J Chem Phys, 1959, 31: 1164–1169.
Tao S J. Positronium Annihilation in Molecular Substances [J]. J Chem Phys, 1972, 56: 5499–5510.
Eldrup M, Lightbody D, Sherwood J N. The Temperature Dependence of Positron Lifetimes in Solid Pivalic Acid [J]. Chem Phys, 1981, 63: 51–58.
Nakanishi H, Wang S J, Jean Y C. Microscopic Surface Tension Studied by Position Annihilation [C]// Positron Annihilation Studies of Fluids. Singapore: World Science, 1988.
Wu S. Entanglement, Friction, and Free Volume between Dissimilar Chains in Compatible Polymer Blends [J]. J Polym Sci, Part B: Polym Phys, 1987, 25: 2511–2529.
Liu J, Jean Y C. Free-Volume Hole Properties of Polymer Blends Probed by Positron Annihilation Spectroscopy: Miscibility [J]. Macromolecules, 1995, 28: 5774–5779.
Zhang Y, Hourston D J. Rigid Interpenetrating Polymer Network Foams Prepared from a Rosin-Based Polyurethane and an Epoxy Resin [J]. J Appl Polym Sci, 1998, 69: 271–281.
Koros W J, Fleming G K, Jordon S M. Polymeric Membrane Materials for Solution-Diffusion Based Permeation Separations [J]. Polym Sci, 1988, 13: 339–343.
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Foundation item: Supported by the National Natural Science Foundation of China (20374038)
Biography: QI Ning(1976–), female, Ph.D. candidate, research direction: applications of nuclear science and technologies.
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Qi, N., Gong, W., Wang, Z. et al. Gas permeability and free volume hole properties of interpenetrating polymer network studied by positrons. Wuhan Univ. J. of Nat. Sci. 12, 271–274 (2007). https://doi.org/10.1007/s11859-006-0046-9
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DOI: https://doi.org/10.1007/s11859-006-0046-9