Synthesis, structure and ring-opening polymerization of macrocyclic arylates containing phthalic unit
โ Scribed by Hongyan Jiang; Tianlu Chen; Yan Xing; Yonghua Lin; Jiping Xu
- Publisher
- SP Science China Press
- Year
- 1997
- Tongue
- English
- Weight
- 490 KB
- Volume
- 40
- Category
- Article
- ISSN
- 1674-7291
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Macrocyclic arylene ether ketone dimer was isolated from a mixture of cyclic oligomers obtained by the nucleophilic substitution reaction of bisphenol A and 4,4-difluorobenzophenone and easily polymerized to high molecular weight linear poly-(ether ketone). The cyclic compound was characterized by F
Novel macrocyclic aryl thioether ester oligomers have been synthesized in high yield from phthaloyl dichloride and 4,49-thiodiphenol under pseudo high dilution conditions. The cyclic nature was unambiguously confirmed by a combination of MALDI-TOF MS, gel permeation chromatography and NMR analyses.
Facile ring-opening polymerization of cyclic aryl ether oligomers containing the 1,2-dibenzoylbenzene moiety to form high molecular weight linear polymers in the presence of a nucleophilic initiator is described. The polymerization can be initiated in the melt in the presence of a nucleophilic initi