Methyl methacrylate and six solutions of methyl methacrylate/dibutyl phthalate (nominally 5 to 30% v/v) were polymerized into thin sheets using gamma radiation. Dynamic mechanical spectra of the storage modulus, loss modulus and loss tangent, as well as changes in length, were investigated as a function of temperature. From these measurements, the depression of the storage modulus and glass-transition temperature were obtained. Subsequently, differential scanning calorimetry (DSC) and cross-polarization-magic-angle-spinning NMR were used to obtain additional glass-transition and relaxation-time measurements. Based upon these experiments, a specific form of the rule of mixtures described the depression of the glass-transition temperature. From storage-modulus measurements, antiplasticization was evidenced at very low temperatures and at compositions greater than 25% v/v. Solid-state NMR confirmed that plasticization causes an increase in polymer main-chain motion via the physical loosening of secondary bonds between polymer chains.
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References
F. N. Kelley and F. Bueche, J. Polym. Sci. 50 (1961) 549.
G. Braun and A. J. Kovacs, in “Physics of the noncrystalline state”, edited by J. A. Printz (North Holland, Amsterdam, 1965).
T. J. Duchek and J. J. Lohr, J. Appl. Polym. Sci. 9 (1965) 3795.
E. A. Dimarzio and J. H. Gibbs, J. Polym. Sci. A 1 (1963) 1417.
A. Eisenberg and S. Saito, J. Chem. Phys 45 (1966) 1673.
P. R. Couchman and F. E. Karasz, Macromolecules 11(1978) 117.
G.Ten Brinke, F. E. Karasz, and T. S. Ellis, Macromolecules, 16 (1983) 244.
M. Goldstein, Macromolecules, 18 (1985) 277.
F. Bueche, in “Physical properties of polymers” (Interscience Publishers, New York, 1962) pp. 116–118.
P. Meares, in “Polymers: structure and bulk properties” (Van Nostrand, London, 1965) pp. 266–267.
M. C. Shen and A. Eisenberg, Prog. Solid State Chem. 3 (1966) 407.
S. Kalachandra and D. T. Turner, J. Polym. Sci. Part B Polym. Phys. 25 (1987) 1971.
L. E. Nielsen, R. E. Pollard and E. Mcintyre, J. Polym. Sci. 6 (1950) 661.
T. W. Wilson and D. T. Turner, J. Dent. Res. 66 (1987) 1032.
T. Murayama, in “Dynamic mechanical analysis of polymeric materials” (Elsevier Scientific, New York, 1978).
S. Kalachandra and D. T. Turner, Polymer 28 (1987) 1749.
S. Kalachandra and D. T. Turner, Dent. Mater. 5 (1989) 161.
E. O. Stejskal, J. Schaefer, M. D. Sefcik and R. A. McKay, Macromolecules 14 (1981) 275.
I. D. SHIN, “The characterization of synthetic polymers by means of solid state NMR methods” PhD thesis, North Carolina State University (1992).
L. A. Wood, J. Polymer Sci. 28 (1958) 319.
L. J. Garfield and S. E. Petrie, J. Phys. Chem. 68 (1964) 1750.
S. S. Chang, as cited by S. Goldstein in Ann. N. Y. Acad. Sci. 279 (1976) 68.
I. Mellan, in “The behaviour of plasticizers” (Pergamon Press, New York, 1961) p. 104.
C. A. Kumins, C. J. Rolle and J. Roteman, J. Phys. Chem. 61 (1957) 1290.
S. Parker and M. Braden, Biomaterials 10 (1989) 91.
J. S. Vorentas, J. L. Duda and H. C. Ling, Macromolecules 21 (1988) 1470.
J. Y. Olayemi and N. A. Oniyangi, J. Appl. Polym. Sci. 26 (1981) 4059.
H-G. Elias, in “Macromolecules 2: synthesis, materials, and technology, 2nd edn (Plenum Press, New York, 1984) pp. 1150–1152.
G. P. Jones, Phys. Rev. 148 (1966) 332.
J. Schaefer, M. D. Sefcik, E. O. Stejskal and R. A. McKay, Macromolecules 17 (1984) 1118.
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Kalachandra, S., Kusy, R.P., Wilson, T.W. et al. Influence of dibutyl phthalate on the mechanical, thermal, and relaxation behaviour of poly (methyl methacrylate) for denture-base soft liners. J Mater Sci: Mater Med 4, 509–514 (1993). https://doi.org/10.1007/BF00120131
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DOI: https://doi.org/10.1007/BF00120131