✦ LIBER ✦

Synthesis and characterization of four-armed poly(1,3-dioxepane) tetraol

✍ Scribed by Yijin Xu; Ye Liu; Caiyuan Pan

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 162 KB
Volume: 37
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19990715)37:14<2347::aid-pola8>3.0.co;2-d

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✦ Synopsis

A new four-armed poly(1,3-dioxepane) tetraol was prepared by cationic ring-opening polymerization of 1,3-dioxepane (DOP) in the presence of 6,6-bis(5-hydroxyl-2-oxapentyl)-4,8-dioxaundecanediol-1,11 (THA) with triflic acid(I) as initiator. The structure of the poly(DOP) tetraol obtained was characterized by 1 H and 13 C NMR spectra. The molecular weights of the obtained tetraols were controlled by the mole ratio of DOP consumed to initial THA, and it was found that each macromolecule contains only one THA unit on the average. GPC studies showed that the cyclic oligomers in the products were negligible.

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