Melt Polymerization of Adipic Anhydride (Oxepane-2,7-Dione)
作者:
Ann-Christine Albertsson,
Stefan Lundmark,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1990)
卷期:
Volume 27,
issue 4
页码: 397-412
ISSN:0022-233X
年代: 1990
DOI:10.1080/00222339009349564
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Oxepane-2,7-dione (1) was prepared by the reaction of adipic acid and acetic anhydride followed by catalytic depolymerization under vacuum. the ring-opening polymerization of (1) was investigated in the melt, and was studied as a function of polymerization temperature, time and concentration of catalyst (stannous 2-ethylhexanoate). from1H-NMR and IR spectra it can be deduced that stannous 2-ethylhexanoate coordinates with the anhydride bond of the ring, and that the resulting species reacts with the monomer by ring-opening of the acyl-oxygen bond. These observations indicate a non-ionic insertion polymerization mechanism at the beginning of the reaction, but after 2 h at 80°C, anhydride exchange appears to be the dominating reaction. Ring-opening melt polymerization of (1) resulted in low molecular weight poly (adipic anhydride).
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