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- Title
Synthesis and thermal treatment of liquid crystal polyarylates containing naphthalene rings.
- Authors
CHEN Yufeng; WANG Xudong; HUANG Shuohan
- Abstract
To reveal the influence of naphthalene ring to properties of polyarylate, different proportions of HBA/HNA liquid crystal polyarylates containing naphthalene ring were prepared by two-step melt polymerization of acetylated monomers 4-acetoxy-benzoic acid (AHA) and 6 -acetoxy- 2-naphthoic acid (ANA). The structure and properties of liquid crystal polyarylates containing naphthalene ring were analyzed. To investigate the effect of heat treatment on the melting and crystallization behavior of liquid crystal polyarylates containing naphthalene rings, liquid crystal polyarylates containing naphthalene rings were heat-treated at 300°C. The results showed that the naphthalene ring monomer 1-INA can disrupt the linear structure of the molecular chain and effectively reduce the melting point of polyarylates; Different proportions of liquid crystal polyarylates containing naphthalene ring exhibited different melting and crystallization behaviors after heat-treatment. The melting point and crystallization temperature of 870-N30 polyarylate gradually increase with the extension of heat-treatment time (melting point gradually increases from 213.1 °C) to 277.6°0, while 1390-N10 polyarylate showed the opposite trend (melting point gradually decreases from 311.6 °C to 290.1 °C), indicating that 870-330 polyarylate has better adjustable and controllable melting temperature.
- Subjects
NAPHTHALENE; MOLECULAR structure; MELTING points; POLYMER liquid crystals; MELT crystallization; HEAT treatment; LIQUID crystals
- Publication
Basic Sciences Journal of Textile Universities / Fangzhi Gaoxiao Jichu Kexue Xuebao, 2023, Vol 36, Issue 6, p30
- ISSN
1006-8341
- Publication type
Article
- DOI
10.13338/j.issn.1006-8341.2023.06.005