Heterogeneous percolation-to-cluster transition in phase separation of an off-critical polymer mixture

1999 ◽  
Vol 110 (7) ◽  
pp. 3612-3620 ◽  
Author(s):  
Hiroyuki Takeno ◽  
Eiji Nakamura ◽  
Takeji Hashimoto
Keyword(s):  
Phase Separation ◽  
Polymer Mixture

Two-step phase separation of a polymer mixture. I. New scaling analysis for the main scattering peak

2000 ◽  
Vol 112 (15) ◽  
pp. 6886-6896 ◽  
Author(s):  
Takeji Hashimoto ◽  
Masaki Hayashi ◽  
Hiroshi Jinnai
Keyword(s):  
Phase Separation ◽  
Polymer Mixture ◽  
Scaling Analysis

Arrested and temporarily arrested states in a protein–polymer mixture studied by USAXS and VSANS

Soft Matter ◽  
2017 ◽  
Vol 13 (46) ◽  
pp. 8756-8765 ◽  
Author(s):  
Stefano Da Vela ◽  
Christian Exner ◽  
Richard Santiago Schäufele ◽  
Johannes Möller ◽  
Zhendong Fu ◽  
...  
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Polymer Mixture ◽  
Protein Polymer ◽  
Coarsening Kinetics ◽  
Liquid Liquid Phase Separation

A three-stage coarsening kinetics is revealed by USAXS in a protein–polymer mixture approaching arrested liquid–liquid phase separation.

Three-dimensional small-angle neutron scattering of shear-induced phase separation in a dynamically asymmetric polymer mixture

2006 ◽  
Vol 39 (6) ◽  
pp. 878-888 ◽  
Author(s):  
Satoshi Koizumi ◽  
Jun-ichi Suzuki
Keyword(s):  
Phase Separation ◽  
Neutron Scattering ◽  
Temperature Region ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Three Dimensional ◽  
Shear Velocity ◽  
Intermediate Temperature ◽  
Polymer Mixture ◽  
Vinyl Methyl Ether

A polymer mixture of polystyrene (PS)/poly(vinyl methyl ether) (PVME) has been investigated by using a three-dimensional small-angle neutron scattering (3D-SANS) method. PS and PVME exhibit a large difference in the glass transition temperatureTg. Therefore, dynamical asymmetry is strongly enhanced in an intermediate temperature region between theTgvalues of neat PS and PVME. In the intermediate temperature region, a shear deformation was imposed on the polymer mixture to enhance the concentration fluctuations,i.e.shear-induced phase separation. By rotating the film specimen, which was rapidly quenched after deformation, 3D-SANS due to shear-induced phase separation was observed successfully. In theqx=qyplane of the sample coordinate system, whereqis a component of scattering vectorq, it was possible to observe SANS of `double-lobe' shape, with the minor axes of the lobes inclined towardsqx=qy, whereqx,qyandqz, denote the shear, velocity gradient and vorticity directions in reciprocal space, respectively. Abnormal `butterfly' scattering was observed in a section cut through the 3D-SANS in theqxqzplane. The 3D-SANS thus obtained is discussed in comparison with a model of dynamical coupling between stress and diffusion.

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