Abstract: The article reports on the noncatalytic transformation of a polybutadiene (number-average molecular weight = 128,000) into a functionalized liquid rubber via the carboxidation of the polymer C=C bonds by nitrous oxide. The reaction was conducted in a benzene solution at 160-230°C and a pressure of 3-6 MPa. The carboxidation mechanism was determined. The main route (95%) of the reaction proceeded without cleavage of C=C bonds and led to the formation of ketone groups in the polymer backbone. A minor route (5%) of the reaction proceeded with the cleavage of C=C bonds, yielding two smaller fragments containing aldehyde and vinyl end groups. The availability of the cleavage route could lead to a dramatic decrease in the molecular weight, which, depending on the carboxidation degree, could be 1-2 orders of magnitude less than that of the initial material. Thus, the carboxidation of more than 15% of the polybutadiene C=C bonds transformed it into a C=O-functionalized liquid rubber with a narrow molecular weight distribution.

Cite: Dubkov K.A. , Semikolenov S.V. , Babushkin D.E. , Echevskaya L.G. , Matsko M.A. , Ivanov D.P. , Zakharov V.A. , Parmon V.N. , Panov G.I.
New Reaction for the Preparation of Liquid Rubber
Journal of Polymer Science, Part A: Polymer Chemistry. 2006. V.44. N8. P.2510-2520. DOI: 10.1002/pola.21353 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Dec 12, 2005
Accepted:	Jan 25, 2006
Published online:	Mar 2, 2006
Published print:	Apr 15, 2006

Identifiers:

Web of science:	WOS:000236595300015
Scopus:	2-s2.0-33646169800
Elibrary:	13521339
Chemical Abstracts:	2006:348909
Chemical Abstracts (print):	145:28345
OpenAlex:	W1971006492

Citing:

DB	Citing
Web of science	26
Scopus	30
Elibrary	45
OpenAlex	31

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