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Title: Silylene-diethynyl-arylene polymers having liquid crystalline properties

Patent ·
OSTI ID:868915
 [1];  [1]
  1. Ames, IA
+ Show Author Affiliations

The present invention provides linear organosilicon polymers including diethynyl-(substituted)arylene units, and a process for their preparation. These novel polymers possess useful properties including electrical conductivity, liquid crystallinity, and/or photoluminescence. These polymers possess good solubility in organic solvents. A preferred example is produced according to the following reaction scheme. ##STR1## These polymers can be solvent-cast to yield excellent films and can also be pulled into fibers from concentrated solutions. All possess substantial crystallinity as revealed by DSC analysis and observation through a polarizing microscope, and possess liquid crystalline properties.

Research Organization:
Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
DOE Contract Number:
W-7405-ENG-82
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
Patent Number(s):
US 5243060
Application Number:
07/866,564
OSTI ID:
868915
Country of Publication:
United States
Language:
English

References (16)

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Synthesis of poly(alkynylsilanes) having various aromatic groups in the backbone journal December 1990
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Efficient, “one-pot” synthesis of silylene–acetylene and disilylene–acetylene preceramic polymers from trichloroethylene journal April 1990
Des dieux, des montagnes et des hommes. La lecture tibétaine du paysage journal January 1987
Synthesis of L-660,631 methyl ester and related compounds journal January 1988
Nutrition, immunité et infection journal January 1989
Iodination of Aromatic Ethers by Use of Benzyltrimethylammonium Dichloroiodate and Zinc Chloride journal May 1988
A New Liquid-Crystalline Material. Transition Metal-Poly(yne) Polymers journal September 1979
Organometallic polymers with acetylene bonds in the chain journal January 1967
Synthesis and spectral study of low dimensional poly-yne polymers containing phthalocyanine silicon and dimethyl silicon in the polymer backbone journal January 1984
A Convenient Synthesis of Ethynylarenes and Diethynylarenes journal January 1980
Nuclear weapons, the balance of terror, the quest for peace journal January 1986
Copper(I) chloride catalyzed cross-dehydrocoupling reactions between silanes and ethynyl compounds. A new method for the copolymerization of silanes and alkynes journal July 1990
Acetylenic and Polyacetylenic Compounds Derived from Thiophene, Furan, and p -Dibromobenzene Using 1,1-Dichloro-2,2-difluoroethene journal July 1981
Halocarbon chemistry. 1. (2-Hydroxyaryl)acetylenes from haloethyl aryl ethers. A new oxygen-to-carbon rearrangement journal December 1985

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Related Subjects

silylene-diethynyl-arylene
polymers
liquid
crystalline
properties
provides
linear
organosilicon
including
diethynyl-
substituted
arylene
units
process
preparation
novel
possess
useful
electrical
conductivity
crystallinity
photoluminescence
solubility
organic
solvents
preferred
example
produced
according
following
reaction
scheme
str1
solvent-cast
yield
excellent
films
pulled
fibers
concentrated
solutions
substantial
revealed
dsc
analysis
observation
polarizing
microscope
concentrated solution
concentrated solutions
produced according
provides linear
liquid crystalline
organic solvents
organic solvent
electrical conductivity
liquid crystal
polymers including
properties including
useful properties
reaction scheme
organosilicon polymers
linear organosilicon
organosilicon polymer
/999/528/