Journal
POLYMER
Volume 46, Issue 14, Pages 5040-5049Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2005.04.044
Keywords
ionomer; nanocomposite; rheology
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A solvent-free reaction of polyethylene-g-maleic anhydride with a tertiary amino alcohol is used to prepare an ammonium carboxylate polyampholyte (PE-g-PA), whose structure is characterized through spectroscopic comparisons to an appropriate model compound. The introduction of ionic functionality results in substantial increases in melt elasticity and viscosity, as well as a demonstrably improved ability to exfoliate onium ion-exchanged montmorillonite clay (NR4+-MM) and to disperse nanosilica (SiO2). Physical and rheological analysis of these nanocomposites suggest that in spite of its relatively small surface area and its capacity to engage only in ion-dipole interactions with PE-g-PA, nanosilica provides a better balance of viscoelastic and mechanical properties when compared with onium-ion exchanged montmorillonite. (c) 2005 Elsevier Ltd. All rights reserved.
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