Phase Separation In Blends of Polystyrene and Poly (P-METHYLSTYRENE) Using Thermal Analysis And Small-Angle Neutron Scattering

1993 ◽  
Vol 321 ◽  
Author(s):  
A. Xenopoulos ◽  
J. D. Londono ◽  
G. D. Wígnall ◽  
B. Wunderlich
Keyword(s):  
Thermal Analysis ◽  
Phase Separation ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Difference ◽  
Glass Transitions ◽  
Scanning Calorimetry ◽  
Reliable Detection ◽  
Sans Data

ABSTRACTDifferential scanning calorimetry (DSC) was used to study blends of polystyrene (PS) and poly (p-Methylstyrene) (PpmS). The presence of two glass transitions on heating after quenching was interpreted as evidence of phase separation at the temperature of the liquid before quenching. The small difference between the glass transitions of the homopolymers in the PS/PpmS system of “13 K limits the reliable detection of double glass transitions for blends to concentrations between 30 and 70%. The results of the DSC technique are supported by comparison with small angle neutron scattering (SANS) data.

A Deformation-Induced Phase Separation in the Solid State

1986 ◽  
Vol 79 ◽  
Author(s):  
J. M. Lefebvre ◽  
R. S. Porter ◽  
G. D. Wignall
Keyword(s):  
Differential Scanning Calorimetry ◽  
Phase Separation ◽  
Solid State ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Scanning Calorimetry

AbstractAmorphous Polymethylmethacrylate/Polyethyleneoxide blends deformed by solid-state coextrusion exhibit anomalous anisotropic Small Angle Neutron scattering patterns in the low q range. It is shown that upon drawing the samples have undergone phase separation to some extent. The resulting structure of the system is characterized by combining scattering techniques with Differential Scanning Calorimetry.

scholarly journals Phase separation in titanium hydrides studied by small-angle neutron scattering

1993 ◽  
Vol 03 (C8) ◽  
pp. C8-287-C8-290 ◽  
Author(s):  
I. O. BASHKIN ◽  
A. I. KOLESNIKOV ◽  
V. Yu. MALYSHEV ◽  
E. G. PONYATOVSKY ◽  
S. BORBÉLY ◽  
...  
Keyword(s):  
Phase Separation ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering

scholarly journals High-pressure small-angle neutron scattering studies of glucose isomerase conformation in solution

2009 ◽  
Vol 42 (3) ◽  
pp. 461-468 ◽  
Author(s):  
Ewa Banachowicz ◽  
Maciej Kozak ◽  
Adam Patkowski ◽  
Gerhard Meier ◽  
Joachim Kohlbrecher
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Electrostatic Interactions ◽  
Xylose Isomerase ◽  
Glucose Isomerase ◽  
Secondary Standard ◽  
High Structural Stability ◽  
Streptomyces Rubiginosus ◽  
Sans Data

Small-angle neutron scattering (SANS) of solutions of glucose/xylose isomerase fromStreptomyces rubiginosuswas measured as a function of pressure. It is shown that the structure of the enzyme in solution as seen by SANS is practically the same as that in the crystal and does not change with pressure up to 150 MPa. This reflects the unusually high structural stability of this material, which makes it extremely interesting to use as a secondary standard for pressure-dependent SANS experiments. This lack of pressure dependence of the SANS data also indicates that any possible change in hydration of the protein induced by pressure is not visible in the SANS curves. An appropriate correction procedure must be used for the SANS data in order to account for the distortion of the intensity curve due to hard-sphere and electrostatic interactions. After this correction, the isomerase can be readily used as a secondary standard for SANS measurements.

A Study of Tio2 Aerogels Pore and Ramified Structure by Small-Angle Neutron Scattering

1994 ◽  
Vol 376 ◽  
Author(s):  
Zhu Zhu ◽  
Min Lin ◽  
Geula Dagan ◽  
Micha Tomkiewicz
Keyword(s):  
Titanium Dioxide ◽  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Gas Adsorption ◽  
Scattering Data ◽  
Morphological Parameters ◽  
Nitrogen Gas ◽  
Light Density ◽  
Sans Data

ABSTRACTThe microstructral characteristics of titanium dioxide aerogels were studied by Small Angle Neutron Scattering (SANS). A variety of models were used to extract the morphological parameters from the SANS data. The evaluation of scattering data was found to be consistent with nitrogen gas adsorption and TEM measurements of a model of aerogel consisting of a light density matrix in which meso- and macro-pores are embedded.

Comment on “Cholesterol solubility limit in lipid membranes probed by small angle neutron scattering and MD simulations” by S. Garg et al., Soft Matter, 2014, 10, 9313

Soft Matter ◽  
2015 ◽  
Vol 11 (27) ◽  
pp. 5580-5581
Author(s):  
Richard M. Epand ◽  
Diana Bach ◽  
Ellen Wachtel
Keyword(s):  
Phase Separation ◽  
Neutron Scattering ◽  
Small Angle ◽  
Lipid Membranes ◽  
Small Angle Neutron Scattering ◽  
Soft Matter ◽  
Md Simulations ◽  
Solubility Limit ◽  
Phospholipid Bilayers ◽  
Cholesterol Solubility

As consistently described in the literature, the solubility limit of cholesterol in phospholipid bilayers is defined by its phase separation and crystallization.

Sign in / Sign up

Export Citation Format

Share Document