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Hypersonic velocity in binary polymer mixtures: Poly(dimethylsiloxane)–poly(ethylmethylsiloxane) (1991)

Fytas, G. ; Kanetakis, J. ; Momper, B. ; [et al.]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 95 (1991), S. 6866-6869

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ISSN: 1089-7690

Source: AIP Digital Archive

Topics: Physics , Chemistry and Pharmacology

Notes: The first Brillouin experiment on the blend poly(dimethylsiloxane)–poly(ethylmethylsiloxane) with critical concentration cursive-phiPDMS =0.53 and an upper critical solution temperature Tc =58 °C is reported. The theoretical calculation of the sound velocity cL in compressible binary mixture is based on the random phase approximation for a ternary incompressible system. According to this new result, the speed cL, in the absence of dispersion effects, depends mainly on free volume and segment–segment interaction potential and remains finite as the blend approaches Tc. The main experimental features are in agreement with the theoretical predictions.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.461497

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