Composition Fluctuations, Phase Behavior, and Complex Formation in Poly(vinyl methyl ether)/D2O Investigated by Small-Angle Neutron Scattering

2005 ◽  
Vol 38 (3) ◽  
pp. 915-924 ◽  
Author(s):  
Erik Nies ◽  
Aissa Ramzi ◽  
Hugo Berghmans ◽  
Ting Li ◽  
Richard K. Heenan ◽  
...  
Keyword(s):  
Complex Formation ◽  
Neutron Scattering ◽  
Phase Behavior ◽  
Methyl Ether ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Vinyl Methyl ◽  
Vinyl Methyl Ether ◽  
Composition Fluctuations

Shear Induced Phase Behavior of Polymer Blends by Small Angle Neutron Scattering

1989 ◽  
Vol 166 ◽  
Author(s):  
Alan I. Nakatani ◽  
Hongdoo Kim ◽  
Charles C. Han
Keyword(s):  
Neutron Scattering ◽  
Polymer Blends ◽  
Phase Behavior ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Large Body ◽  
Concentric Cylinder ◽  
Shear Rates ◽  
Lower Shear ◽  
High Shear Rates

ABSTRACTThe phase behavior of polymer blends and solutions can be changed dramatically by a flow field using a variety of flow geometries. Unlike simple binary fluids which require extremely high shear rates to produce only small shifts in the phase boundary, polymer phase behavior may be influenced by as much as 10 degrees with the application of much lower shear rates. However, there is a large body of conflicting data concerning the nature of these shear effects in polymers.Here we report on the effects of shear on the phase behavior of polymer blends by small angle neutron scattering (SANS). Experiments were conducted using a specially constructed, concentric cylinder apparatus for in situ studies of concentrated polymer solutions and melts. Two separate systems will be discussed: 1) a blend of polystyrene and polybutadiene. 2) a blend of polystyrene and poly(vinylmethylether). Both systems exhibit shifts in the phase behavior which indicate shear induced mixing in agreement with previous results obtained by other techniques. These results will be interpreted within the context of existing theories of shear induced phase behavior.

Phase behavior of blends of poly (vinyl methyl ether) with styrene-acrylonitrile in film

2005 ◽  
Vol 59 (21) ◽  
pp. 2680-2684 ◽  
Author(s):  
Kun Yang ◽  
Qi Yang ◽  
Guangxian Li ◽  
Yajie Sun ◽  
Yimin Mao
Keyword(s):  
Phase Behavior ◽  
Methyl Ether ◽  
Vinyl Methyl ◽  
Vinyl Methyl Ether ◽  
Styrene Acrylonitrile

Small-angle neutron scattering studies on phase behavior of block copolymers

1999 ◽  
Vol 60 (8-9) ◽  
pp. 1307-1312 ◽  
Author(s):  
H Hasegawa ◽  
N Sakamoto ◽  
H Takeno ◽  
H Jinnai ◽  
T Hashimoto ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Neutron Scattering ◽  
Phase Behavior ◽  
Small Angle ◽  
Small Angle Neutron Scattering
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