Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00032 : Ionic Aggregation and Microphase Separation in Sulfonated Polyester Multiblock Copolymers and Ionomers
Author:
Polyethylene oxide (PEO) has been copolymerized with
polytetramethylene
oxide (PTMO) using a sulfonated phthalate ionic linker between
blocks. The
product is a linear multiblock copolymer, which is neutralized
with lithium
and sodium. We used X-ray scattering to investigate the
morphology from
25\r{ }C to 200\r{ }C. The results show that this copolymer
exhibits three
distinct morphology characteristics. First, microphase separation
exists
between the PEO and PTMO phases. Second, ionic aggregates occur
in the PEO
microdomains. Finally, the appearance of better defined ionic
aggregates
occurs in the PTMO microdomains. Ion aggregation and microphase
separation
are studied as functions of temperature and copolymer molar
composition. DRS
analysis confirms that ionic aggregation is independent of copolymer
composition.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.32
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