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Phase Behavior of Triblock Copolymers upon Incorporation of Non-Parent, Midblock-Associating Additives

Published online by Cambridge University Press:  10 February 2011

J. H. Laurer ,
J. F. Mulling ,
R. Bukovnik  and
R. J. Spontak
J. H. Laurer
Affiliation:
Department of Materials Science & Engineering, North Carolina State Univ., Raleigh, NC 27695
J. F. Mulling
Affiliation:
Department of Materials Science & Engineering, North Carolina State Univ., Raleigh, NC 27695
R. Bukovnik
Affiliation:
Telecom Division, Raychem Corporation, Fuquay-Varina, NC 27526
R. J. Spontak
Affiliation:
Department of Materials Science & Engineering, North Carolina State Univ., Raleigh, NC 27695
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Abstract

Addition of a block-selective homopolymer to a microphase-ordered block copolymer is known to result in preferential swelling of the chemically compatible microdomain. In this work, we examine the miscibility between a triblock copolymer and a relatively low-molecular-weight, chemically dissimilar, midblock-associating homopolymer and demonstrate that the homopolymer molecules residing in the swollen midblock matrix self-assemble to avoid repulsive interactions with neighboring microdomains. We extend this investigation to include systems composed of a very low-molecular-weight, midblock-associating additive (an oil). At high oil concentrations, the glassy copolymer endblocks micellize, resulting in the formation of a thermoplastic elastomer gel.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 461: Symposia BB – Morphological Control in Multiphase Polymer Mix… , 1996 , 69
Copyright
Copyright © Materials Research Society 1997

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References

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