Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers
We demonstrate that the temperature-dependent phase behaviors of parallel and perpendicular cylinder-forming block copolymers are governed by domain-domain segregation forces inherently present in block copolymer material itself. With increasing temperature, a parallel cylinder-forming block copolym...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2009-05-01
|
Series: | International Journal of Molecular Sciences |
Subjects: | |
Online Access: | http://www.mdpi.com/1422-0067/10/5/2169/ |
id |
doaj-c66fc5d79642431699e5191e44fa46df |
---|---|
record_format |
Article |
spelling |
doaj-c66fc5d79642431699e5191e44fa46df2020-11-24T23:28:39ZengMDPI AGInternational Journal of Molecular Sciences1422-00672009-05-011052169218910.3390/ijms10052169Temperature-Dependent Phase Behaviors in Cylinder-Forming Block CopolymersErol SancaktarDae Up AhnWe demonstrate that the temperature-dependent phase behaviors of parallel and perpendicular cylinder-forming block copolymers are governed by domain-domain segregation forces inherently present in block copolymer material itself. With increasing temperature, a parallel cylinder-forming block copolymer experienced a parallel cylinder straightening process before the order-disorder transition (ODT) and did not show long-range composition fluctuations near the ODT temperature due to the weak segregation forces between the block domains. A perpendicular cylinder-forming block copolymer with a strong segregation force between the block domains displayed cylinder orientation transition from perpendicular to parallel below the ODT temperature. On the other hand, a perpendicular cylinder-forming block copolymer material with an exceptionally strong segregation force between the block domains maintained its initial perpendicular cylinder orientation up to near the ODT temperature. In both cases of perpendicular cylinder-forming block copolymers, submicrometer-scale long-range composition fluctuations were observed well above the ODT temperature due to their intrinsically strong segregation forces between the block domains. http://www.mdpi.com/1422-0067/10/5/2169/block copolymersblock copolymer self-assemblydynamic mechanical propertiesorientation transition of block copolymer nano-cylindersorder-disorder transition of block copolymers |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Erol Sancaktar Dae Up Ahn |
spellingShingle |
Erol Sancaktar Dae Up Ahn Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers International Journal of Molecular Sciences block copolymers block copolymer self-assembly dynamic mechanical properties orientation transition of block copolymer nano-cylinders order-disorder transition of block copolymers |
author_facet |
Erol Sancaktar Dae Up Ahn |
author_sort |
Erol Sancaktar |
title |
Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers |
title_short |
Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers |
title_full |
Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers |
title_fullStr |
Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers |
title_full_unstemmed |
Temperature-Dependent Phase Behaviors in Cylinder-Forming Block Copolymers |
title_sort |
temperature-dependent phase behaviors in cylinder-forming block copolymers |
publisher |
MDPI AG |
series |
International Journal of Molecular Sciences |
issn |
1422-0067 |
publishDate |
2009-05-01 |
description |
We demonstrate that the temperature-dependent phase behaviors of parallel and perpendicular cylinder-forming block copolymers are governed by domain-domain segregation forces inherently present in block copolymer material itself. With increasing temperature, a parallel cylinder-forming block copolymer experienced a parallel cylinder straightening process before the order-disorder transition (ODT) and did not show long-range composition fluctuations near the ODT temperature due to the weak segregation forces between the block domains. A perpendicular cylinder-forming block copolymer with a strong segregation force between the block domains displayed cylinder orientation transition from perpendicular to parallel below the ODT temperature. On the other hand, a perpendicular cylinder-forming block copolymer material with an exceptionally strong segregation force between the block domains maintained its initial perpendicular cylinder orientation up to near the ODT temperature. In both cases of perpendicular cylinder-forming block copolymers, submicrometer-scale long-range composition fluctuations were observed well above the ODT temperature due to their intrinsically strong segregation forces between the block domains. |
topic |
block copolymers block copolymer self-assembly dynamic mechanical properties orientation transition of block copolymer nano-cylinders order-disorder transition of block copolymers |
url |
http://www.mdpi.com/1422-0067/10/5/2169/ |
work_keys_str_mv |
AT erolsancaktar temperaturedependentphasebehaviorsincylinderformingblockcopolymers AT daeupahn temperaturedependentphasebehaviorsincylinderformingblockcopolymers |
_version_ |
1725548502714417152 |