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Synthesis and Properties of Thermotropic Copolyesters Based on Poly(ethylene terephthalate) and 4'-Acetoxy-4-biphenylcarboxylic Acidстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 30 июня 2021 г.
- Авторы: Mikhaylov P.A., Zuev K.V., Filatova M.P., Strelets B.K., Kulichikhin V.G.
- Журнал: Polymers
- Том: 13
- Год издания: 2021
- Издательство: MDPI
- Местоположение издательства: Basel, Switzerland
- Первая страница: 1720-1
- Последняя страница: 1720-17
- Номер статьи: 1720
- DOI: 10.3390/polym13111720
- Аннотация: A series of novel copolyesters based on polyethylene terephthalate (PET) and 40-hydroxybiphenyl-4-carboxylic acid (HBCA) was obtained by melt polycondensation of bis(2-hydroxyethyl)terephthalate and 40-acetoxybiphenyl-4-carboxylic acid (ABCA) as co-monomers with Sb2O3 asa catalyst. Using this synthetic procedure, a set of copolymers containing 20–80 mol% of HBCAunits was prepared. According to NMR spectroscopy, the copolymers were of random composition.Copolyesters comprising 60–80 mol% of HBCA possessed increased heat resistance and formednematic melts at 270 C and higher. The liquid crystal (LC) phase formation was accompanied bytransition to non-Newtonian characteristics of the melt flow, as well as an equalization of storageand loss moduli values. According to XRD and polarizing microscopy, the LC glassy phase ofthe copolyesters coexists with crystalline regions of poly-(40-hydroxy-4-biphenylcarboxylate), nonmeltingup to 400 C and above. The mechanical characteristics of these LC copolyesters showedsimilar or better values than those of well-known LC polymers. These novel copolyesters canbe useful in obtaining heat-resistant materials with an ordered structure and, as a consequence,improved performance.
- Добавил в систему: Зуев Кирилл Владимирович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | polymers-13-01720-v2_1.pdf | 4,3 МБ | 22 июня 2021 [ZuevKV] |