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Preliminary communication Thermotropic liquid crystals in main chain polyesters having a mesogenic 4,4-biphenyldicarboxylate unit. 9. Chain folding in solid polyesters crystallized from smectic A

 

作者: MASATOSHI TOKITA,   KENSUKE OSADA,   JUNJI WATANABE,  

 

期刊: Liquid Crystals  （Taylor Available online 1997）
卷期: Volume 23, issue 3  

页码: 453-456

 

ISSN:0267-8292

 

年代: 1997

 

DOI:10.1080/026782997208389

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

The lamellar structure with chain foldings is formed from the main chain polyesters crystallized from the SmA phase. The lamellar spacing increases with a decrease in crystallization temperature. This trend is contrary to that observed in conventional polymers, and is explainable if the chain foldings exist at a thermodynamic equilibrium as an entropy effect in the preceding SmA phase.

 

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