Abstract
The glass transition temperature Tg and to some extent the melting temperature Tm of collagen, cellulose, polyamide 6 and 66, and of the statistical copolyamide 6/66 were investigated with the differential scanning calorimeter after equilibration of the specimens at various humidities at 295K. The results showed that smaller amounts of absorbed water cause a pronounced shift of Tg to lower temperatures due to the breaking of hydrogen bonds and the reduction of the cohesive energy between the polymer chains. Additional water molecules form clusters with previously absorbed water and Tg decreases are less pronounced. The plasticizing effect of water on natural polymers exceeds by far the effect on synthetic polyamides, as does its influence on Tm in the case of collagen.
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BATZER, H., Chem.Ztg. 76, 397 (1952)
BATZER, H. and GRUNEWALD, H.J., Makromol.Chem. 9, 116 (1953)
BATZER, H. and KREIBICH, U.T., Angew.Makromol.Chem. in press
BATZER, H. and MOESCHLE, A., Makromol.Chem. 22, 195 (1957)
BATZER, H. and PETRY, G., Makromol.Chem. 7, 328 (1952)
BATZER, H. and WEISSENBERGER, G., Makromol.Chem. 7, 320 (1952)
CHAMPETIER, G. and PIED, J.P., Makromol.Chem. 44, 64 (1961)
GOLDBACH, G., Angew.Makromol.Chem. 32, 37 (1973)
HAYES, R.A., J.Appl.Polym.Sci. 5, 318 (1961)
KAKIVAYA, S.R. and HOEVE, C.A.J., Proc.Nat.Acad.Sci.USA 72, 3505 (1975)
KALUTSKAYA, E.P. and GUSEV, S.S., Vysokomol.soyed. A22, 497 (1980)
KARGIN, V.A. et al., Doklady Akad.Nauk.SSSR 130, 356 (1960)
KREIBICH, U.T. and BATZER, H., Angew.Makromol.Chem. 83, 59 (1979)
MACGREGOR, E.A. and GREENWOOD, C.T.: Polymers in Nature, Chichester, New York, Brisbane, Toronto: John Wiley & Sons 1980
MARSHALL, A.S. and PETRIE, S.E.B., J.Photograph.Sci. 28, 128 (1980)
OGIWARA, Y. et al., J.Appl.Polym.Sci. 14, 303 (1970)
PAPIR, Y.S. et al., J.Polym.Sci., Part A-2 10, 1305 (1972)
RASMUSSEN, D.H. and MACKENZIE, A.P., J.Phys.Chem. 75, 967 (1971)
REIMSCHUESSEL, H.K., J.Polym.Sci.Polym.Phys.Ed. 16, 1229 (1978)
STARKWEATHER Jr., H.W., Macromolecules 8, 477 (1975)
STARKWEATHER Jr., H.W. in ROWLAND, S.P.: Water in Polymers, Washington, D.C.: ACS symposium Series 127 (1980)
WARD, A.G. and COURTS, A.: The Science and Technology of Gelatin, London, New York, San Francisco: Academic Press 1977
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Batzer, H., Kreibich, U.T. Influence of water on thermal transitions in natural polymers and synthetic polyamides. Polymer Bulletin 5, 585–590 (1981). https://doi.org/10.1007/BF00255296
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DOI: https://doi.org/10.1007/BF00255296