The phase state of poly(butadiene-b-tert-butyl methacrylate) and poly(ethylene-b-tert-butyl methacrylate) diblock copolymers
Loading...
Date
Authors
Schipper, F. J. M.
Floudas, G.
Pispas, S.
Hadjichristidis, N.
Pakula, T.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Type
Type of the conference item
Journal type
peer reviewed
Educational material type
Conference Name
Journal name
Macromolecules
Book name
Book series
Book edition
Alternative title / Subtitle
Description
We report on the phase state of two new diblock copolymer systems, poly(butadiene-b-tert-butyl methacrylate) (BBMA) and poly(ethylene-b-tert-butyl methacrylate) (EBMA). The EBMA system was synthesized from the BBMA by hydrogenation of the polybutadiene block, thus creating two systems at practically the same volume fractions and identical degrees of polymerization, but with different segment interaction parameters and conformational asymmetries. Hydrogenation of the butadiene block resulted in an increased incompatibility and to an asymmetric phase diagram. In one of the EBMA copolymers with a PE volume fraction f(PE) = 0.42, crystallization of the PE blocks was confined by the cylindrical mesophase in a fluid matrix. Upon PE crystallization, the hexagonal order was found to improve significantly following a matrix-assisted reorganization.
Description
Keywords
order-disorder transition, block-copolymers, microphase separation, behavior, melts, temperature, nucleation, diagram, growth
Subject classification
Citation
Link
<Go to ISI>://000178954100033
http://pubs.acs.org/doi/pdfplus/10.1021/ma020540b
http://pubs.acs.org/doi/pdfplus/10.1021/ma020540b
Language
en
Publishing department/division
Advisor name
Examining committee
General Description / Additional Comments
Institution and School/Department of submitter
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών