Abstract
Poly(vinyl chloride)/Poly(methyl methacrylate) — PVC/PMMA — blends were investigated by comparative p-V-T and differential scanning calorimetry (DSC) measurements. The study was concentrated on the glass transition range of the blends, and it was found that the blends are characterized by a single glass transition temperature suggesting miscibility of the blend components. It is shown that the glass temperature of the blends increases with both increasing heating rate and pressure. In parallel hereto one observes a decrease in the volume expansion coefficients, which is more accentuated for the polymeric melts than for the polymeric glasses. The dependence of the glass temperature on the composition of the polymer blends shows a sigmoidal behaviour which is due to the fact that positive deviations of the glass temperature from values predicted by additivity rules are observed in the high PVC concentration range, whereas in the high PMMA range negative deviations occur. This suggests a denser packing of the blends and thus a stronger interaction between the blend components in the high PVC concentration range. These packing differences increase with increasing pressure and decreasing heating rate and are generally more accentuated for the glass temperatures evaluated from p-V-T measurements.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
J. W. Schurer, A. de Boer and G. Challa, Polymer, 16 (1975) 201.
I. N. Razinska, L. I. Vidyakina, T. I. Radbil and B. P. Shtrokman, Polymer Sci. USSR (Engl. Trans.), 14 (1972) 1079.
J. F. Parmer, L. C. Dickinson, J. C. W. Chien and R. S. Porter, Macromolelules, 22 (1989) 1078.
B. Albert, R. Jerome, P. Teyssie, G. Smyth, N. G. Boyle and V. J. McBrierty, Macromolecules, 18 (1985) 388.
M.-J. Brekner, H. A. Schneider and H.-J. Cantow, Polymer, 29 (1988) 78; Makromol. Chem., 189 (1988) 2085.
M. Gordon and J. S. Taylor, J. Appl. Chem., USSR, 2 (1952) 493.
H. A. Schneider and E. A. DiMarzio, Polymer, 33 (1992) 3453; H. A. Schneider, Polymer Bull., 40 (1998) 321.
H. A. Schneider, J. Res. Natl. Inst. Stand. Technol., 102 (1997) 229.
E. A. DiMarzio, Polymer, 31 (1990) 2294.
T.G. Fox, Bull. Am. Phys. Soc., 1 (Session J.) (1965) 123.
J. H. Gibbs and E. A. DiMarzio, J. Chem. Phys., 28 (1958) 373 and 807.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Karlou, K., Schneider, H.A. DSC and p-V-T Study of PVC/PMMA Blends. Journal of Thermal Analysis and Calorimetry 59, 59–69 (2000). https://doi.org/10.1023/A:1010119525345
Issue Date:
DOI: https://doi.org/10.1023/A:1010119525345