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 : 11 DOI: 10.1002/app.44638 | ||||||
| Tags | catalysts, mechanical properties, polyolefins, structure–property relationships, thermal properties | ||||||
| Authors |
|
||||||
| Affiliations |
|
Funding (1)
| 1 | The Ministry of Education and Science of the Russian Federation | 14.607.21.0046 (RFMEFI60714X0046) |
Abstract:
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. b 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 b 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
Cite:
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 :1-11. DOI: 10.1002/app.44638 WOS Scopus РИНЦ ANCAN OpenAlex
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 :1-11. DOI: 10.1002/app.44638 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Sep 7, 2016 |
| Accepted: | Nov 7, 2016 |
| Published online: | Dec 23, 2016 |
| Published print: | Apr 10, 2017 |
Identifiers:
| Web of science: | WOS:000392611800007 |
| Scopus: | 2-s2.0-85007360527 |
| Elibrary: | 29467997 |
| Chemical Abstracts: | 2016:2145629 |
| Chemical Abstracts (print): | 166:95556 |
| OpenAlex: | W2563616232 |