Dielectric properties of diblock copolymers

G. E. Johnson, E. W. Anderson, X. Quan, F. S. Bates

Research output: Contribution to journalArticlepeer-review


Dielectric spectroscopy was used to probe a series of diblock copolymers which have widely different degrees of order. The 1,2-polybutadiene/1,4-polybutadiene diblock copolymer system was chosen because both ordered and disordered morphologies can be obtained near room temperature. It is observed that the local motions of the high-temperature component are greatly enhanced in the block copolymer over the homopolymer. Also found is evidence of local concentration fluctuations of the low-temperature component which are large enough to exhibit a glass transition, even in samples that appear to be completely disordered on the length scales probed by SANS and rheological measurements.

Original languageEnglish (US)
Pages (from-to)403-411
Number of pages9
JournalConference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
StatePublished - Dec 1 1988


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