SANS, SAXS, rheology and birefringence—strengths and weaknesses in probing phase behaviour of a diblock copolymer

Asymmetrically composed diblock copolymers exhibit multiphase behaviour and transit the lamellae, gyroid and hexagonal cylindrical phases before reaching the order–disorder temperature, T ODT. During a heating experiment towards T ODT we observe that birefringence measurements are more sensitive tha...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2004-07, Vol.350 (1), p.E885-E888
Main Authors: Vigild, Martin E, Eskimergen, Rüya, Mortensen, Kell
Format: Article
Language:English
Subjects:
Birefringence
Diblock copolymer
Dynamical mechanical analysis
Multi-phase behaviour
Small-angle neutron scattering
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Summary:Asymmetrically composed diblock copolymers exhibit multiphase behaviour and transit the lamellae, gyroid and hexagonal cylindrical phases before reaching the order–disorder temperature, T ODT. During a heating experiment towards T ODT we observe that birefringence measurements are more sensitive than dynamic mechanical testing and have faster data acquisition rates than SANS when used to follow transient states of the sample. However, birefringence measurements cannot alone identify the precise phase behaviour.
ISSN:0921-4526
DOI:10.1016/j.physb.2004.03.229