THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS

DONG Yanming; LI Zhimin

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THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS

Papers | Updated：2021-06-21

- THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS
- Vol. 12, Issue 1, Pages: 44-48(1994)
- Affiliations：
  
  1.   Department of Chemistry
  2.   University of Xiangtan
  3.   Hunan 411105
- Author bio：
- Funds：
- DOI：
  CLC： O631.5
- Published：20 March 1994
- Accepted：
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[1]董炎明,李志敏.THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS[J].Chinese Journal of Polymer Science,1994,{4}(01):44-48.

DONG Yanming, LI Zhimin. THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS[J]. 1994, 12(1): 44-48.
[1]董炎明,李志敏.THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS[J].Chinese Journal of Polymer Science,1994,{4}(01):44-48. DOI：

DONG Yanming, LI Zhimin. THE NON—ISOTHERMAL CRYSTALLIZATION KINETICS OF A LIQUID CRYSTALLINE RANDOM COPOLYESTER WITH DIFFERENT COMPOSITIONS[J]. 1994, 12(1): 44-48. DOI：

摘要

<正> The non-isothermal crystallization kinetics analysis of liquid crystalline random copolyestercomposed of p-oxybenzoate （B） and 2

6-oxynaphthoate （N） monomers was carried out by meansof differential scanning calorimetry basing on Ziabicki and Jeziorny method. Although the compo-sition of 58/42 B-N copolyester had poorer thermodynamic crystallizability comparing with thoseof 30/70 and 75/25

its kinetic crystallizability Go was slightly larger. This fact was due to thepoorer match of sequences of 58/42 B-N in domains of nematic melt

and therefore better mobilityof chains during crystallization. The Avrami exponents of three composition species were allabout 2. 5

implying two dimensional growth in so-called non-periodic layer crystallites and a mixture of homogeneous and heterogeneous nucleation.

Abstract

The non-isothermal crystallization kinetics analysis of liquid crystalline random copolyestercomposed of p-oxybenzoate （B） and 2

its kinetic crystallizability Go was slightly larger. This fact was due to thepoorer match of sequences of 58/42 B-N in domains of nematic melt

and therefore better mobilityof chains during crystallization. The Avrami exponents of three composition species were allabout 2. 5

implying two dimensional growth in so-called non-periodic layer crystallites and a mixture of homogeneous and heterogeneous nucleation.

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