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Polymerization of 2,6,7-trioxabicyclo[2.2.1]heptane with either contraction or expansion

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Summary

2 ,6 ,7-Trioxabicyclo[2.2.1] heptane (I) polymerizes to poly ortho ester (Poly-I) at −78°C with opening of one ring and volume shrinkage. Heating Poly-I with acid isomerized it to an open chain poly-ether formate (Poly-II); this occurred with a large volume expansion. Direct conversion of I to Poly-II by heating with acid occurred with net moderate increase. Monomer I is the first reported monomer which can be polymerized with either shrinkage or expansion as desired. Saponification of Poly-II gave Poly-III, a new water-soluble copolymer.

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References

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Authors and Affiliations

  1. Department of Chemistry, College of Liberal Arts, University of Arizona, 85721, Tucson, Arizona, USA

    H. K. Hall Jr. & Y. Yokoyama

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  1. H. K. Hall Jr.
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  2. Y. Yokoyama
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Hall, H.K., Yokoyama, Y. Polymerization of 2,6,7-trioxabicyclo[2.2.1]heptane with either contraction or expansion. Polymer Bulletin 2, 281–287 (1980). https://doi.org/10.1007/BF00282287

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  • DOI: https://doi.org/10.1007/BF00282287

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