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Ethylene Propylene Rubber Polyampholytes and their Blends with Polypropylene as an Alternative to Chemically Cross‐ L inked Thermoplastic Elastomers and Thermoplastic Vulcanizates
Author(s) -
Powell Andrew,
Kontopoulou Marianna,
Hojabr Sassan
Publication year - 2014
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201300120
Subject(s) - materials science , electron paramagnetic resonance , ethylene propylene rubber , thermoplastic elastomer , polymer chemistry , thermoplastic , elastomer , peroxide , composite material , polymer , chemistry , copolymer , organic chemistry , physics , nuclear magnetic resonance
An ethylene propylene rubber polyampholyte (EPR‐g‐PA) containing zwitterionic ammonium carboxylate grafts is prepared by reacting maleated EPR (EPR‐g‐MAn) with a tertiary amino alcohol, 2‐[2‐(dimethylamino)ethoxy]ethanol (DMAEE). EPR‐g‐PA has equivalent viscoelastic properties to an EPR that is lightly cross‐linked using a peroxide cure, but with a higher strain hardening coefficient and elongation at break. EPR‐g‐PA has similar adhesion to metals and improved adhesion to other ionomers, whereas the adhesive strength to a polyamide substrate is reduced compared to the EPR‐g‐MAn. The in situ reaction of EPR‐g‐MAn with DMAEE during blending with PP produced a blend with superior impact properties compared to the thermoplastic vulcanizate (TPV) blend of peroxide cross‐linked EPR‐g‐MAn and PP.