Dynamic mechanical analysis of ethylene/1-hexene copolymers: The effect of the catalyst type on the short-chain branching distribution and properties of the amorphous and crystalline phases

Dynamic mechanical analysis of ethylene/1-hexene copolymers: The effect of the catalyst type on the short-chain branching distribution and properties of the amorphous and crystalline phases Full article

Journal

Journal of Applied Polymer Science
ISSN: 0021-8995 , E-ISSN: 1097-4628

Output data

Year: 2017, Volume: 134, Number: 14, Article number : 44638, Pages count : DOI: 10.1002/app.44638

Tags

catalysts; mechanical properties; polyolefins; structure-property relationships; thermal properties

Authors

Shundrina Inna K. ^1,2 , Matsko Mikhail A. ³ , Baskakova Kseniya I. ^1,2 , Echevskaya Ludmila G. ³ , Nikolaeva Marina I. ³ , Shundrin Leonid A. ^1,2 , Zakharov Vladimir A. ^2,3

Affiliations

1	(Данные Web of science) NN Vorozhtsov Novosibirsk Inst Organ Chem, Prospect Lavrentieva 9, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia
3	(Данные Web of science) Boreskov Inst Catalysis, Prospect Lavrentieva 5, Novosibirsk 630090, Russia

Dynamic mechanical analysis was used to study ethylene/1-hexene copolymers with different compositions, molecular weight distributions, and profiles of short-chain branching (SCB) versus molecular weight. These copolymers were produced over a highly active supported titanium-magnesium catalyst (TMC), a highly active supported vanadium-magnesium catalysts (VMC), and a supported zirconocene catalyst. A higher fraction of the crystalline phase in the copolymers prepared with VMC was shown to result in higher elastic modulus values. beta relaxation was found to be sensitive to the SCB distribution versus the molecular weight. The copolymers prepared with the zirconocene catalyst and VMC were characterized by more uniform SCB distributions and higher temperatures of beta relaxation compared to the copolymers prepared with TMC. The mobility of the polymer chains at room temperature in the amorphous phase obtained by the spin-probe method rose with increasing branch content in the copolymers and was not sensitive to different SCB distribution profiles. (C) 2016 Wiley Periodicals, Inc.

Shundrina I.K. , Matsko M.A. , Baskakova K.I. , Echevskaya L.G. , Nikolaeva M.I. , Shundrin L.A. , Zakharov V.A.
Dynamic mechanical analysis of ethylene/1-hexene copolymers: The effect of the catalyst type on the short-chain branching distribution and properties of the amorphous and crystalline phases
Journal of Applied Polymer Science. 2017. V.134. N14. 44638 . DOI: 10.1002/app.44638 WOS Scopus РИНЦ

Published online:	Dec 23, 2016
Published print:	Apr 10, 2017

Web of science	WOS:000392611800007
Scopus	2-s2.0-85007360527
Elibrary	29467997
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