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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