A broad band antiferroelectric liquid crystalline mixture: Physical properties

1996 ◽  
Vol 178 (1) ◽  
pp. 267-276 ◽  
Author(s):  
Jan Bömelburg ◽  
Gerd Heppke ◽  
Lachezar Komitov ◽  
Sven T. Lagerwall ◽  
Bengt Stebler
Keyword(s):  
Physical Properties ◽  
Liquid Crystalline ◽  
Broad Band ◽  
Crystalline Mixture

Synthesis and Properties of Biodegradable Liquid Crystalline Poly(ester-Urethane)s Based on Poly(L-Lactic Acid)

2013 ◽  
Vol 652-654 ◽  
pp. 459-462
Author(s):  
Ya Tong Guo ◽  
Zhu Zheng ◽  
Zhen Qi Hou ◽  
Jie Du
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Lactic Acid ◽  
Physical Properties ◽  
Liquid Crystalline ◽  
Degradation Rate ◽  
Hydrolytic Degradation ◽  
Hexamethylene Diisocyanate ◽  
Solution Polymerization ◽  
Phase Transition Temperatures

A series of biodegradable segmented liquid crystalline poly(ester-urethane)s were prepared by solution polymerization of poly(L-lactic acid) (PLLA), mesogenic diol prepolymer poly(butylene terephthaloyldioxy dibenzoates) (MD), and hexamethylene diisocyanate (HDI). The MD content was varied from 0 to 40 mol% so that the effects of the mesogen content on the thermal and physical properties, and hydrolytic degradation were examined respectively. It was found that introducing mesogens units could increase the thermal stability and the elastic properties, while reduced the phase transition temperatures and the hydrolytic degradation rate.

Effects ofp-hydroxybenzoic acid monomer units on physical properties of thermal liquid crystalline poly(ester imide ketone)s

2006 ◽  
Vol 103 (5) ◽  
pp. 3183-3193 ◽  
Author(s):  
Jun Xu ◽  
Yafei Zhu ◽  
Yi Zhang ◽  
Yimin Zheng ◽  
Zhenguo Chi ◽  
...  
Keyword(s):  
Physical Properties ◽  
Liquid Crystalline ◽  
Hydroxybenzoic Acid

Physical Properties of Liquid Crystalline 5-n-Hexyl-2-(4-n-alkyloxyphenyl)-pyrimidines

1986 ◽  
Vol 21 (5) ◽  
pp. 685-695 ◽  
Author(s):  
A. Hauser ◽  
Ch. Selbmann ◽  
R. Rettig ◽  
D. Demus
Keyword(s):  
Physical Properties ◽  
Liquid Crystalline

Hearing Loss in Relation to Physical Properties of Middle Ear Effusions

1980 ◽  
Vol 89 (3_suppl) ◽  
pp. 185-189 ◽  
Author(s):  
M. L. Wiederhold ◽  
J. G. Vap ◽  
J. T. Zajtchuk ◽  
R. E. Paggi
Keyword(s):  
Hearing Loss ◽  
Physical Properties ◽  
Middle Ear ◽  
Sound Pressure ◽  
Broad Band ◽  
Type B ◽  
Control Series ◽  
Middle Ear Pressure ◽  
Flat Type ◽  
Significant Difference

Hearing loss was measured in cats after ligation of the eustachian tube (ET) on one side to produce middle ear effusions. Auditory nerve responses to broad-band clicks were recorded from the ear canal. Plots of N1 response amplitude and latency versus click sound pressure level (SPL) were constructed. Hearing loss was determined as the average displacement along the SPL axis of the latency plot, relative to a previously recorded control series. Viscosity of effusion was measured with a cone and plate viscometer. Specific gravity was measured using a 1 cc pycnometer. Middle ear pressure was assessed tympanographically. After ET ligation, all cats developed negative middle ear pressure within three days and flat (type B) tympanograms within seven days. Hearing loss also developed early and became maximal at about three weeks. Tympanocentesis yielded either thin fluid or glue-like effusions in nearly equal numbers. The data indicate there is not a significant difference between the amount of hearing loss associated with thin fluids or with glue. Viscosity is not clearly related to the duration of time the fluid is present in the middle ear. There is a significant positive correlation between the amount of hearing loss and the volume of fluid present in the middle ear. Thus, the amount of hearing loss appears to depend only on the volume of effusion and is not significantly dependent on other physical properties of the fluid.

scholarly journals Photonic Crystals: Photocontrollable Photonic Crystals Based on Porous Silicon Filled with Photochromic Liquid Crystalline Mixture (Advanced Optical Materials 22/2020)

2020 ◽  
Vol 8 (22) ◽  
pp. 2070089
Author(s):  
Alexey Bobrovsky ◽  
Sergey Svyakhovskiy ◽  
Alexey Bogdanov ◽  
Valery Shibaev ◽  
Martin Cigl ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Photonic Crystals ◽  
Optical Materials ◽  
Liquid Crystalline ◽  
Crystalline Mixture

Physical Properties of Hydrogels Synthesized from Lyotropic Liquid Crystalline Templates

2003 ◽  
Vol 15 (17) ◽  
pp. 3376-3384 ◽  
Author(s):  
Christopher L. Lester ◽  
Shannon M. Smith ◽  
Colleen D. Colson ◽  
C. Allan Guymon
Keyword(s):  
Physical Properties ◽  
Liquid Crystalline
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