Solid‐State Polymerization of a Liquid Crystalline Copolyester Derived from 2,6‐Naphthalene Dicarboxylic Acid, Terephthalic Acid, 4‐Acetoxybenzoic Acid and Hydroquinone Diacetate

2005 ◽  
Vol 44 (2) ◽  
pp. 249-259 ◽  
Author(s):  
X. Pan ◽  
Z. Chi ◽  
D. Cheng ◽  
M. Jin ◽  
H. Bu
Keyword(s):  
Solid State ◽  
Dicarboxylic Acid ◽  
Terephthalic Acid ◽  
Liquid Crystalline ◽  
Solid State Polymerization ◽  
Liquid Crystalline Copolyester

scholarly journals SYNTHESIS OF PHOSPHORUS-CONTAINING THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTERS via SOLID-STATE POLYMERIZATION

2009 ◽  
Vol 009 (5) ◽  
pp. 493-498 ◽  
Author(s):  
Li CHEN ◽  
Hengzhen HUANG ◽  
Yuzhong WANG ◽  
Jinde JOW ◽  
Kenny SU
Keyword(s):  
Solid State ◽  
Liquid Crystalline ◽  
Phosphorus Containing ◽  
Solid State Polymerization

Structure-property relations of liquid crystalline polymers

1987 ◽  
Vol 45 ◽  
pp. 460-463
Author(s):  
Linda C. Sawyer
Keyword(s):  
Solid State ◽  
Liquid Crystalline ◽  
Structural Model ◽  
Crystalline Polymer ◽  
Liquid Crystalline Polymers ◽  
Mechanical Anisotropy ◽  
Structure Property ◽  
Preparation Methods ◽  
Crystalline Polymers ◽  
Extended Chain

Recent liquid crystalline polymer (LCP) research has sought to define structure-property relationships of these complex new materials. The two major types of LCPs, thermotropic and lyotropic LCPs, both exhibit effects of process history on the microstructure frozen into the solid state. The high mechanical anisotropy of the molecules favors formation of complex structures. Microscopy has been used to develop an understanding of these microstructures and to describe them in a fundamental structural model. Preparation methods used include microtomy, etching, fracture and sonication for study by optical and electron microscopy techniques, which have been described for polymers. The model accounts for the macrostructures and microstructures observed in highly oriented fibers and films.Rod-like liquid crystalline polymers produce oriented materials because they have extended chain structures in the solid state. These polymers have found application as high modulus fibers and films with unique properties due to the formation of ordered solutions (lyotropic) or melts (thermotropic) which transform easily into highly oriented, extended chain structures in the solid state.

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