ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary A series of poly(3,3′, 5,5′-tetraethyldiphenylmethane-1,m-alkanedi-carboxamide(poly(TEDPM-ADA(m=8–18)))) were synthesized from 1,m-alkane-dicarboxylic acids(ADA(m=8–18)) and 4,4′-diamino-3,3′,5,5′-tetraethyl-diphenylmethane by use of direct polycondensation in the presence of triphenylphosphite. The enantiotropic nematic liquid crystals were observed in the m=12–18 and monotropic liquid crystals were observed in the m=8–11 in poly(TEDPM-ADA). Mesogenicity of the polyamides increases with an increase in the number of methylene spacers, m.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00293519
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