Abstract.
It is shown that experimental Tg vs. composition data of miscible polymer blends can be adapted by a third order Tg vs. composition equation characterized by two parameters, K1 and K2, which result in the supposition that besides the thermodynamically claimed favourable energetic hetero-interaction, contributions of conformational mixing entropy are responsible for miscibility. K1 comprises mainly energetic interaction effects, whereas K2 is due to effects of the conformational mixing entropy. It further results surprisingly that K1 is roughly correlated with the difference of the solubility parameters of the blend components. At the moment no explanation can be offered for this observation.
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Received: 22 October 1997/Revised version: 3 December 1997/Accepted: 3 December 1997
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Schnider, H. Considerations concerning the glass temperature of blends of miscible polymers. Polymer Bulletin 40, 321–328 (1998). https://doi.org/10.1007/s002890050258
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DOI: https://doi.org/10.1007/s002890050258