Magnetic Field Orientation of Liquid Crystalline Epoxy Thermosets

1998 ◽  
Vol 31 (15) ◽  
pp. 4730-4738 ◽  
Author(s):  
Brian C. Benicewicz ◽  
Mark E. Smith ◽  
Jim D. Earls ◽  
Ralph D. Priester ◽  
Stefan M. Setz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Liquid Crystalline ◽  
Field Orientation ◽  
Magnetic Field Orientation ◽  
Liquid Crystalline Epoxy

Effect of Processing Variables on The Magnetic Field Orientation of Liquid Crystalline Thermosets

1999 ◽  
Vol 559 ◽  
Author(s):  
Derek M. Lincoln ◽  
Elliot P. Douglas
Keyword(s):  
Magnetic Field ◽  
Liquid Crystalline ◽  
Fractional Factorial Design ◽  
Fractional Factorial ◽  
Field Orientation ◽  
Magnetic Field Orientation ◽  
Liquid Crystalline Epoxy ◽  
Processing Variables ◽  
Degree Of Orientation ◽  
The Magnetic Field

ABSTRACTWe have investigated the effect of various processing variables on the magnetic field orientation of a liquid crystalline epoxy. By using a modified fractional factorial design, we created an empirical model which can be used to predict the degree of orientation as a function of these variables. The model predicts the correct qualitative trends, namely that orientation increases with increasing magnetic field strength, increases with increasing time in the field, and decreases with increasing B-staging. The model also reveals some surprising effects of B-staging on the degree of orientation.

Curing and Alignment of Liquid Crystalline Epoxy Networks

1990 ◽  
Vol 203 ◽  
Author(s):  
C. K. Ober ◽  
G. G. Barclay ◽  
K I. Papathomas ◽  
D. W. Wang
Keyword(s):  
Liquid Crystalline ◽  
Coefficient Of Thermal Expansion ◽  
Wide Angle ◽  
Curing Process ◽  
X Ray Diffraction ◽  
Field Orientation ◽  
Magnetic Field Orientation ◽  
X Ray ◽  
Epoxy Networks ◽  
Liquid Crystalline Epoxy

ABSTRACTLiquid crystalline epoxy networks have been prepared from glycidyl terminated polyether oligomers of varying molecular weight. These oligomers were prepared by functionalizing hydroxy terminated oligomers based on 4,4'- dihydroxy-α-methylstilbene and α,ω-dibromoalkanes with glycidyl groups. Curing of these oligomers was carried out either within their nematic mesophase or in their isotropic state. Different thermal properties were observed after curing under these two sets of conditions. Extremely low values of the coefficient of thermal expansion in the range of 15 to 60 ppm/°C were achieved. To produce aligned thermosets, orientation of the liquid crystalline phase was induced during the curing process by a magnetic field. Orientation of these networks was measured by wide angle x-ray diffraction (WAXD).

Quantification of cardiac magnetic field orientation during ventricular de- and repolarization

2008 ◽  
Vol 53 (9) ◽  
pp. 2291-2301 ◽  
Author(s):  
Peter Van Leeuwen ◽  
Birgit Hailer ◽  
Silke Lange ◽  
Anita Klein ◽  
Daniel Geue ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Orientation ◽  
Magnetic Field Orientation

The influence of a magnetic field on the morphology and thermomechanical properties of a liquid crystalline epoxy carbon composite

2018 ◽  
Vol 39 (S4) ◽  
pp. E2573-E2583 ◽  
Author(s):  
Beata Mossety-Leszczak ◽  
Maciej Kisiel ◽  
Piotr Szałański ◽  
Magdalena Włodarska ◽  
Urszula Szeluga ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Liquid Crystalline ◽  
Carbon Composite ◽  
Thermomechanical Properties ◽  
Liquid Crystalline Epoxy

Chiral nematic suspensions of cellulose crystallites; phase separation and magnetic field orientation

1994 ◽  
Vol 16 (1) ◽  
pp. 127-134 ◽  
Author(s):  
Jean-François Revol ◽  
Louis Godbout ◽  
Xue-Min Dong ◽  
Derek G. Gray ◽  
Henri Chanzy ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Separation ◽  
Field Orientation ◽  
Magnetic Field Orientation ◽  
Chiral Nematic
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