Characterization of PMMA--3-octanone binary by turbidity and light scattering measurements. - Archive ouverte HAL Access content directly
Preprints, Working Papers, ... Year :

## Characterization of PMMA--3-octanone binary by turbidity and light scattering measurements.

(1) , (1) , (1) , (1)
1
Caroline Crauste
• Function : Correspondent author
• PersonId : 947385

Connectez-vous pour contacter l'auteur
Clemence Devailly
• Function : Author
• PersonId : 947386
Audrey Steinberger
Sergio Ciliberto
• Function : Author
• PersonId : 829236

#### Abstract

We measure the coexistence curve and the critical point properties of a binary mixture composed by polymethylmethacrylate (PMMA) at $M_w = 55900$ g/mol with 3-~octanone. This binary mixture which has a demixing transition with an upper critical solution temperature $T_c$ has indeed interesting properties which may be useful for several application : a) its correlation length is larger than that of a liquid-liquid binary mixture, b) it is less viscous than a polymer blend; c) 3-~octanone has an evaporation rate much smaller than other solvents. The mixture is first characterized by turbidity, to get the demixing temperature for different volumic fraction of PMMA. The coordinates of the critical point are obtained: $\phi_c = 12.8\pm0.2$ \% and $T_c = 306.5\pm0.1$ K. The correlation length $\xi$ near the critical point is then measured in a solution with a 12.8~\% volumic fraction of PMMA using static light scattering. Using the fact that PMMA-octanone mixture has scaling exponents compatible with Ising 3D, we determine more precisely the critical temperature $T_c = 306.58\pm0.04$ K and we find that $\xi \simeq \xi_0 [(T-T_c)/{T_c}]^{-0.63}$ with $\xi_0 = 0.97\pm 0.02$~nm. The discrepancy between this value and that extrapolated from other measurements based on turbidity is discussed.

### Dates and versions

ensl-00876273 , version 1 (24-10-2013)

### Identifiers

• HAL Id : ensl-00876273 , version 1
• ARXIV :

### Cite

Caroline Crauste, Clemence Devailly, Audrey Steinberger, Sergio Ciliberto. Characterization of PMMA--3-octanone binary by turbidity and light scattering measurements.. 2013. ⟨ensl-00876273⟩

### Export

BibTeX TEI Dublin Core DC Terms EndNote Datacite

83 View