Thermodynamics of Symmetric Diblock Copolymers Containing Poly(styrene-ran-styrenesulfonic acid)

Thumbnail Image
Date
2012-12-26
Authors
Hernández, Nacú
Benson, Calvin
Cochran, Eric
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Department
Chemical and Biological Engineering
Abstract

We examine the thermodynamic behavior of diblock copolymers representing the binary pairs of the ternary system: poly(dimethylsiloxane)/poly(ethylene-stat-propylene)/poly(styrene-ran-styrenesulfonic acid), D/EP/SS. We employ small-angle X-ray scattering, electron microscopy, and rheology to characterize the order-to-disorder transition temperature TODTand lamellar period d of 28 materials with varying molecular weights and sulfonation extents. These data are then interpreted in the context of self-consistent mean-field theory employing the continuous Gaussian chain model to deduce the interaction parameters as a function of temperature and sulfonation extent. We find that while EPD and SSEP are amenable to such treatment, the SS/D interaction forces SSD chains to stretch beyond the realm of applicability of the Gaussian chain model.

Comments

Reprinted with permission from Macromolecules 46 (2013): 179–187, doi:10.1021/ma301228v. Copyright 2012 American Chemical Society.

Description
Keywords
Citation
DOI
Subject Categories
Copyright
Sun Jan 01 00:00:00 UTC 2012
Collections