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Modification of polyolefins with silicone copolymers. I. Processing behavior and surface characterization of PP and HDPE blended with silicone copolymers
Author(s) -
Yilgor Iskender,
Yilgor Emel,
Suzer Sefik
Publication year - 2001
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.10066
Subject(s) - materials science , copolymer , silicone , polydimethylsiloxane , high density polyethylene , polypropylene , polymer chemistry , polyethylene , contact angle , composite material , surface modification , plastics extrusion , chemical engineering , polymer , engineering
Permanent surface modification of polypropylene and high‐density polyethylene was obtained by blending with small (0.1 to 5.0% by weight) amounts of silicone copolymers. A triblock polycaprolactone‐ b ‐polydimethylsiloxane copolymer and a multiblock polydimethylsiloxane–urea copolymer were used as modifiers. Blends were prepared in a twin‐screw extruder. Influences of the type and amount of the additive on the processing behavior and surface and bulk properties of the resulting systems were investigated. During processing, the additives also acted as very efficient processing aids, increasing the extruder output dramatically, up to 200%. Surface characterization by water‐contact angle measurements and X‐ray photoelectron spectroscopy clearly showed the formation of silicone‐rich surfaces even with very small amounts of additives, such as 0.1% by weight. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 83: 1625–1634, 2002