Conclusions
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1.
The molecular weights of a cyclolinear polymer of polybenzoxazole were measured for the first time.
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2.
Data on the polydispersion correspond to a linear structure of the polymer.
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The article is published on the basis of a resolution of the Conference of Editors-in-Chief of the Journals of the Academy of Sciences of the USSR, from July 12, 1962, as the dissertation work of L. V. Boiko.
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2435–2440, November, 1967.
The authors would like to express their deep gratitude to G. M. Tseitlin and A. I. Parlor for providing the polybenzoxazole samples.
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Boiko, L.V., Korshak, V.V. & Pavlova, S.A. Investigation of solutions of polybenzoxazoles. Russ Chem Bull 16, 2322–2325 (1967). https://doi.org/10.1007/BF00911836
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DOI: https://doi.org/10.1007/BF00911836