Determination of Mark–Houwink parameters of ethylene–norbornene copolymers and molecular characteristics estimation | Zendy

Yao Zhen | Zendy; Liu Shaojie | Zendy; Lv Fei | Zendy; Cao Kun | Zendy

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Determination of Mark–Houwink parameters of ethylene–norbornene copolymers and molecular characteristics estimation

Author(s) -

Yao Zhen,

Liu Shaojie,

Lv Fei,

Cao Kun

Publication year - 2008

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.28498

Subject(s) - norbornene , polymer chemistry , copolymer , gel permeation chromatography , ethylene , polyethylene , rheology , intrinsic viscosity , materials science , chemistry , catalysis , polymer , organic chemistry , composite material

Ethylene–norbornene copolymers (ENC) with ∼ 50%, ∼ 25% and ∼ 15% norbornene (NB) fraction in a wide range of molecular weight were produced by metallocene catalysts. By coupling the gel permeation chromatography (GPC) with the intrinsic viscosity data in 1,2,4‐trichlorobenzene (TCB)at 150°C, the Mark–Houwink parameters of ENC were determined and compared with previous classical analysis using polyethylene's relative parameters. The results indicated that parameter K was considerably increased with decreasing NB fraction in ENC but parameter α was only increased slightly. Furthermore, the structure characteristics and correlative rheological parameters of resultant ENC were also calculated and discussed by the Stockmayer–Fixman analysis. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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