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Multifunctional covalent and ionic coupling agents of maleic anhydride modified polyethylene
Author(s) -
Colbeaux Aimeline,
Fenouillot Françoise,
David Laurent,
Gerard JeanFrançois,
Taha Mohamed,
Wautier Henri
Publication year - 2007
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.26380
Subject(s) - maleic anhydride , materials science , covalent bond , polymer chemistry , ionic bonding , polyethylene , polymer , small angle x ray scattering , chemical engineering , chemistry , organic chemistry , copolymer , composite material , scattering , ion , physics , optics , engineering
Amine and alcohol functional dendritic polymers were used as covalent coupling agents for maleic anhydride grafted polyethylene and their efficiency compared with metallic salt and zinc acetate, acting as an ionic coupling agent. The crosslinking reactions in the molten state were carried out at 150°C in an internal mixer and the resulting modified polyethylenes were characterized by dynamic mechanical analysis and Small angle X‐ray Scattering. These agents led to efficient coupling and crosslinking. The covalent coupling reactions were conducted in a heterogeneous multiphase system: The kinetics of crosslinking depends on the nature of the coupling agent: at 150°C, the reactions were completed within 5 min. with the amine hyperbranched polymer and 20 min. with the alcohol functionalized dendritic polymer. The zinc acetate forms ionic interactions with the grafted polyethylene in less than 1 min. Ionic interactions are thermo mechanically reversible; they correspond to electronic density fluctuations evidenced by SAXS. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007