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SYNTHESIS AND COPOLYMERIZATION OF AZIDOMETHYL-SUBSTITUTED OXETANES: THE MORPHOLOGY OF STATISTICAL BLOCK COPOLYMERS

Тимур И. Мухаметшин, Алексей И. Петров, Нина В. Кузнецова, Владимир А. Петров, Наталья В. Аверьянова, Ильгиз Х. Гараев, Анатолий В. Косточко, Айдар Т. Губайдуллин, Дмитрий Б. Виноградов, Павел В. Булатов
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Abstract


3,3-Bis(azidomethyl)oxetane and 3-azidomethyl-3-methyloxetane were obtained by bromination of pentaerythritol and metriol with a mixture of hydrobromic, acetic, and sulfuric acids, followed by cyclization in the presence of a phase-transfer catalyst TBAB, with the formation of oxetane ring and replacement of bromide substituents with azide ions. The copolymerization reaction of 3,3-bis-(azidomethyl)oxetane and 3azidomethyl-3-methyloxetane was performed in the presence of a catalytic system prepared from triisobutylaluminum and water. The methods of small-angle and wide-angle X-ray diffraction analysis were used to determine the amorphous-crystalline and domain structures of the synthesized copolymers. We also present data about conformational and relaxation transitions in these statistical copolymers.

 


Keywords


3-azidomethyl-3-methyloxetane; 3,3-bis(azidomethyl)oxetane; trialkylaluminum; amorphous-crystalline structure; domain structure; cationic ring-opening polymerization

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