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Effects of Nanoparticle and Matrix Interface on Nanocomposite Properties

Miller, Sandi G.
http://rave.ohiolink.edu/etdc/view?acc_num=akron1216947385

Abstract Details

2008, Doctor of Philosophy, University of Akron, Polymer Science.
Commonly, surface modification of nano-sized particles is employed to facilitate both dispersion and favorable interaction with the matrix. Modification may be in the form of a covalently or ionically bonded organic molecule, or through surface oxidation. The versatility in functionalization provides a mechanism to optimize the interface of any given nanoparticle and matrix combination. The objectives of this work are to functionalize two nanoparticles, layered silicate clay and expanded graphite, and determine the effects of a given functionalization on the properties of a thermosetting resin. Two resin systems are evaluated, a polyimide for high temperature applications, and a general use epoxy. The influence of the surface modification is tailored in each case to optimize nanocomposite properties including: dispersion, thermal oxidative stability (TOS), electrical conductivity, strength, and toughness. The work with layered silicate clays demonstrated that improved thermal oxidative stability of a thermosetting polyimide was achieved only when the clay was modified with a combination of an aromatic diamine and an alkyl ammonium ion. Careful attention was also necessary for silicate modification for dispersion in an epoxy blend. Here we observed an affinity between the clay and the aromatic containing sections of the epoxy blend. By forcing the clay into the non-aromatic component, the material yield stress, toughness, and Tg were significantly improved.
Darrell Reneker (Advisor)
191 p.
Polymers
Polyimide; epoxy; nanocomposite; graphite; silicate

Recommended Citations

Citations

  • Miller, S. G. (2008). Effects of Nanoparticle and Matrix Interface on Nanocomposite Properties [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216947385

    APA Style (7th edition)

  • Miller, Sandi. Effects of Nanoparticle and Matrix Interface on Nanocomposite Properties. 2008. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1216947385.

    MLA Style (8th edition)

  • Miller, Sandi. "Effects of Nanoparticle and Matrix Interface on Nanocomposite Properties." Doctoral dissertation, University of Akron, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216947385

    Chicago Manual of Style (17th edition)

akron1216947385
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© 2008, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.