The viscosity of PEG-modified urethane acrylate (PMUA) showed peculiar behavior in the course of soap-free emulsification. Moreover, the viscosity change with added amounts of water was influenced by the reaction molar ratio of polyethylene glycol (PEG). The rate of increase in viscosity slowed and the ratio of increase in viscosity increased as the reaction molar ratio of PEG increased. This peculiar viscosity behavior was due to the microphase separation between hydrophilic and hydrophobic segments of PMUA, and the orientation of polyoxyethylene groups at O/W interface which influenced droplet size of the soap-free PMUA emulsion. The location of polyoxyethylene groups of this resin at O/W interface was confirmed using the adsorption isotherm measurement of PMUA molecules containing polyoxyethylene groups at water/benzene interface. The microphase separation behavior of PMUA between hydrophilic and hydrophobic segments could apply to the preparation of the PMUA gels containing peculiar structure. PMUA gels were prepared using dioxane (UAG) and the swelling behavior of these gels were compared to that of gels prepared using water (UAHG) in the same medium. In the same medium, the swelling behavior of UAHG gels differed from that of UAG gels because of the difference in the microstructure of gel due to the microphase separation between hydrophilic and hydrophobic segments. This phase separation in the course of gelation in water could be confirmed using contact angle measurement.
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Dieterich D, Keberle W, Witt H (1970) Angew Chem Int Ed 9:40
Chen SA, Chan WC (1990) J Polym Sci, Part B Polym Phys 28:1515–1532
Kim JW, Kim JY, Suh KD (1996) Polym Bull 36:141–148
Song ME, Kim JY, Suh KD (1996) J Coating Technol, in press
Kim JY, Suh KD (1995) Colloid Polym Sci, in press
Gould FE, Johnstons CW (1985) US Pat 4, 496, 535
Gould FE, Johnstons CW (1985) US Pat 4, 454, 309
Lai YC (1991) J Appl Polym Sci 42:2833
Lai YC, Baccei LJ (1991) 42:3173
Kim JY, Suh KD (1996) Polym Bull 36:131–144
Kim JY, Suh KD (1996) Macromole Chem Phys, in press
Pal R (1993) Colloid Surface A 71: 173–185
Otsubo Y, Prud'homme RK (1989) Colloid & Surface 40:125–136
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Kim, J.-., Suh, K.-. Microphase separation of PEG-modified urethane acrylate and the swelling behavior of its gels. Colloid Polym Sci 274, 1025–1032 (1996). https://doi.org/10.1007/BF00658367
- PEG-modified urethane acrylate
- microphase separation
- interfacial tension
- gel-swelling ratio
- contact angle measurement