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Modification of lignin–polyethylene blends with high lignin content using ethylene–vinylacetate copolymer as modifier
Author(s) -
Alexy Pavol,
Košíková Božena,
Crkonová Gabriela,
Gregorová Adriána,
Martiš Pavol
Publication year - 2004
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.20716
Subject(s) - lignin , polyethylene , materials science , ultimate tensile strength , copolymer , elongation , ethylene , composite material , izod impact strength test , composite number , chemical engineering , polymer chemistry , polymer , organic chemistry , chemistry , catalysis , engineering
Blending of polyethylene with lignin in concentrations > 20 wt % yielded blends with relatively low mechanical properties. A new method, based on modification of polyethylene with ethylene–vinylacetate (EVA) copolymer, was developed for the preparation of polyethylene blends containing about 30 wt % lignin with acceptable strength properties. The addition of 10 wt % EVA caused an increase of tensile strength about twice and elongation at break about 13 times compared to those of the corresponding nonmodified samples. The optimization of lignin–polyethylene–EVA blend composition was based on a regression equation, which was obtained as output from an experimental design. The prepared composite material with 33.6 wt % lignin showed acceptable processing and mechanical properties. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1855–1860, 2004