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|Title:||Modeling Hydrogen-Bonding in Diblock Copolymer/Homopolymer Blends|
|Authors:||Dehghan, Kooshkghazi Ashkan|
|Department:||Physics and Astronomy|
|Keywords:||SCFT;Diblock Copolymer;Homopolymer;Hydrogen Bonding;Self-Consistent Field Theory;Phase transitions;Biological and Chemical Physics;Condensed Matter Physics;Statistical Models;Biological and Chemical Physics|
|Abstract:||<p>The phase behavior of AB diblock copolymers mixed with C homopolymers (AB/C), in which A and C are capable of forming hydrogen-bonds, is examined using self-consistent ﬁeld theory. The study focuses on the modeling of hydrogen-bonding in polymers. Speciﬁcally, we examine two models for the formation of hydrogen-bonds between polymer chains. The ﬁrst commonly used model assumes a large attractive interaction parameter between the A/C monomers. This model reproduces correct phase transition sequences as compared with experiments, but it fails to correctly describe the change of lamellar spacing induced by the addition of the C homopolymers. The second model is based on the fact that hydrogen-bonding leads to A/C complexation. We show that the interpolymer complexation model predicts correctly the order-order phase transition sequences and the decrease of lamellar spacing for strong hydrogen-bonding. Our analysis demonstrates that hydrogen-bonding of polymers should be modeled by interpolymer complexation.</p>|
|Appears in Collections:||Open Access Dissertations and Theses|
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