Evaluation of molecular volume change of block copolymer depending on temperature: A SANS study
Abstract
Amphiphilic Pluronic triblock copolymers form various self-assembled structures such as sphere, cylinder, lamellae and so on, depending on temperature, leading to the increase of hydrophobicity of block copolymers. However, the effective molecular volume change of the block copolymer has not been fully exploited yet, when temperature increases. Here in this paper, we have investigated the effective molecular volume change of the block copolymer upon heating by using the contrast variation small angle neutron scattering. The scattering length densities (SLDs) of the block copolymer were experimentally obtained from the neutron scattering contrast variation method between the solvent and the block copolymer at varying temperature. Even though the SLD, which is the intrinsic property of the material, should not be changed by temperature elevation, it was dependent on temperature, indicating that the molecular volume is changed. Therefore, we obtained the increase rate of the molecular volume change of the block copolymer (the effective molecular volume change) from the comparison of the calculated SLD and the standard SLD, which is evaluated by plotting the SANS intensity at the first order Bragg peak as the function of temperature at each volume fraction of D2O and H2O that is about 25.5%–51.3% depending on temperature.
- Authors:
-
[2];
- Chonbuk National Univ., Jeonju (Korea, Republic of). Dept. of Quantum System Engineering; Korea Atomic Energy Research Inst., Yuseong-gu, Daejeon (Korea, Republic of). Neutron Science Division, Research Reactor Utilization Dept.
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology and Soft Matter Division
- Korea Atomic Energy Research Inst., Yuseong-gu, Daejeon (Korea, Republic of). Neutron Science Division, Research Reactor Utilization Dept.
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Research Foundation of Korea (NRF); Chonbuk National University; Ministry of Education
- OSTI Identifier:
- 1422542
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physica. B, Condensed Matter
- Additional Journal Information:
- Journal Volume: 551; Journal ID: ISSN 0921-4526
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Small angle neutron scattering (SANS); Neutron contrast variation; Phase behavior; Block copolymer and self-assembly
Citation Formats
Kim, Tae-Hwan, Do, Changwoo, and Han, Young-Soo. Evaluation of molecular volume change of block copolymer depending on temperature: A SANS study. United States: N. p., 2017.
Web. doi:10.1016/j.physb.2017.12.059.
Kim, Tae-Hwan, Do, Changwoo, & Han, Young-Soo. Evaluation of molecular volume change of block copolymer depending on temperature: A SANS study. United States. https://doi.org/10.1016/j.physb.2017.12.059
Kim, Tae-Hwan, Do, Changwoo, and Han, Young-Soo. Sun .
"Evaluation of molecular volume change of block copolymer depending on temperature: A SANS study". United States. https://doi.org/10.1016/j.physb.2017.12.059. https://www.osti.gov/servlets/purl/1422542.
@article{osti_1422542,
title = {Evaluation of molecular volume change of block copolymer depending on temperature: A SANS study},
author = {Kim, Tae-Hwan and Do, Changwoo and Han, Young-Soo},
abstractNote = {Amphiphilic Pluronic triblock copolymers form various self-assembled structures such as sphere, cylinder, lamellae and so on, depending on temperature, leading to the increase of hydrophobicity of block copolymers. However, the effective molecular volume change of the block copolymer has not been fully exploited yet, when temperature increases. Here in this paper, we have investigated the effective molecular volume change of the block copolymer upon heating by using the contrast variation small angle neutron scattering. The scattering length densities (SLDs) of the block copolymer were experimentally obtained from the neutron scattering contrast variation method between the solvent and the block copolymer at varying temperature. Even though the SLD, which is the intrinsic property of the material, should not be changed by temperature elevation, it was dependent on temperature, indicating that the molecular volume is changed. Therefore, we obtained the increase rate of the molecular volume change of the block copolymer (the effective molecular volume change) from the comparison of the calculated SLD and the standard SLD, which is evaluated by plotting the SANS intensity at the first order Bragg peak as the function of temperature at each volume fraction of D2O and H2O that is about 25.5%–51.3% depending on temperature.},
doi = {10.1016/j.physb.2017.12.059},
journal = {Physica. B, Condensed Matter},
number = ,
volume = 551,
place = {United States},
year = {Sun Dec 24 00:00:00 EST 2017},
month = {Sun Dec 24 00:00:00 EST 2017}
}
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Works referencing / citing this record:
Unexpected Phase Behavior of Pluronic Polymer-Organic Derivative Mixtures Depending on Temperature in Aqueous Solution
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- Jang, Jong-Dae; Kim, Eunhye; Lee, Min-Jae
- Micromachines, Vol. 9, Issue 10
Unexpected Phase Behavior of Pluronic Polymer-Organic Derivative Mixtures Depending on Temperature in Aqueous Solution
journal, October 2018
- Jang, Jong-Dae; Kim, Eunhye; Lee, Min-Jae
- Micromachines, Vol. 9, Issue 10