Entropy-driven surface segregation in block copolymer melts

Mohan Sikka, Navjot Singh, Alamgir Karim, Frank S. Bates, Sushil K. Satija, Charles F. Majkrzak

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Surface segregation in thin films of symmetric polyolefin diblock copolymers containing a lamellar microstructure, cast on a variety of substrates, has been investigated. In all cases, the conformationally smaller block preferentially segregated to both the solid and air interfaces even though the surface energy of the solid substrate always exceeded that of the block copolymer. These results indicate an entropically driven surface segregation effect that we attribute to block conformational asymmetry.

Original languageEnglish (US)
Pages (from-to)307-310
Number of pages4
JournalPhysical Review Letters
Volume70
Issue number3
DOIs
StatePublished - Jan 1 1993

Fingerprint Dive into the research topics of 'Entropy-driven surface segregation in block copolymer melts'. Together they form a unique fingerprint.

Cite this