Characterization and Chemical Nucleation of a Polyaryletherether Ketone (Peek)

Autor:	Eric Nield, D. Leblanc, Jacques Devaux, Daniel Daoust, Roger Legras
Rok vydání:	2010
Předmět:	chemistry.chemical_classification Ketone Chemical shift Nucleation Ionic bonding chemistry.chemical_element General Chemistry Characterization (materials science) chemistry Chemical engineering Fluorine Peek Organic chemistry Spectroscopy
Zdroj:	Bulletin des Sociétés Chimiques Belges. 98:677-690
ISSN:	0037-9646
DOI:	10.1002/bscb.19890980909
Popis:	19NMR spectroscopy has been performed on PEEK samples in sulphuric acid, revealing that most chain ends are fluorine. Different chemical shifts have been observed on sulphonated samples due to already demonstrated long range shielding effects. The method appears suitable for Mn determination. Substitution of F chain ends, followed by 19NMR, appeared feasible leading to alkaline sulphonate end groups. Ionic chain ends associations act as seeds for nucleation. Fast crystallizing PEEK and PEK are thus obtained. This is a new demonstration of the concept of Chemical Nucleation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::52ea6ccd5e7d2387f7758133adeb5218 https://doi.org/10.1002/bscb.19890980909 Zobrazit plný text záznamu