Ion-Complexation-Induced Changes in the Interaction Parameter and the Chain Conformation of PS-b-PMMA Copolymers

Wang, Jia-Yu and Chen, Wei and Russell, Thomas P.. (2008) Ion-Complexation-Induced Changes in the Interaction Parameter and the Chain Conformation of PS-b-PMMA Copolymers. Macromolecules, 41 (13). pp. 4904-4907. ISSN 0024-9297

Full text not available from this repository. (Request a copy)

Abstract

Small-angle neutron scattering (SANS) was used to study the changes of segmental interactions and chain conformation due to the formation of lithium−PMMA complexes in polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) copolymers as a function of temperature and the percentage of carbonyl groups coordinated with lithium ions. χeffc and statistical segmental length, σ, are derived from the SANS profiles of the copolymers with lithium−PMMA complexes in a disordered state by use of the correlation-hole scattering formalism described by Leibler. Fitting results show that both χeffc and σ of PS and PMMA increase as the formation of lithium−PMMA complexes in PS-b-PMMA copolymers, and the degree of such increase depends on the concentration of lithium−PMMA complexes. In addition, χeffc of the lithium-complexed PS-b-PMMA becomes less temperature-dependent due to the increase in χs and decrease in χH.

Item Type: Article
Additional Information: Reprinted with permission from "Ion-Complexation-Induced Changes in the Interaction Parameter and the Chain Conformation of PS-b-PMMA Copolymers", T Russell et al., Macromolecules, 41(3), pg 4904 - 4907. Copyright 2008 American Chemical Society.
InterNano Taxonomy: Nanomanufacturing Processes > Nanopatterning/Lithography > Block copolymer lithography
Nanoscale Objects and Nanostructured Materials > Nanostructured Materials > Block copolymers
Nanoscale Objects and Nanostructured Materials > Nanocomposites > Thin films
Nanomanufacturing Characterization Techniques > Diffraction and Scattering > Neutron diffraction
Nanomanufacturing Processes
Collections: Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing
Nanomanufacturing Research Collection
Depositing User: Moureen Kemei
Date Deposited: 17 Feb 2010 20:06
Last Modified: 19 Sep 2011 21:24
URI: http://eprints.internano.org/id/eprint/285

Actions (login required)

View Item View Item