skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
 [1]; ORCiD logo [2];  [3]
  1. 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.
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Biology and Soft Matter Division
  3. 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 Lab. (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. https://doi.org/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 = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Self-Assembling Behavior of Amphiphilic Dendron Coils in the Bulk Crystalline and Liquid Crystalline States
journal, May 2008

  • Chung, Yeon-Wook; Lee, Jeong-Kyu; Zin, Wang-Cheol
  • Journal of the American Chemical Society, Vol. 130, Issue 22
  • DOI: 10.1021/ja801163m

Self-Assembly of Hyperbranched Polymers and Its Biomedical Applications
journal, September 2010


Epitaxial self-assembly of block copolymers on lithographically defined nanopatterned substrates
journal, July 2003

  • Ouk Kim, Sang; Solak, Harun H.; Stoykovich, Mark P.
  • Nature, Vol. 424, Issue 6947, p. 411-414
  • DOI: 10.1038/nature01775

Block Copolymer Self-Assembly–Directed Single-Crystal Homo- and Heteroepitaxial Nanostructures
journal, October 2010


Directing the self-assembly of block copolymers
journal, October 2007


Nanostructure engineering by templated self-assembly of block copolymers
journal, October 2004

  • Cheng, Joy Y.; Mayes, Anne M.; Ross, Caroline A.
  • Nature Materials, Vol. 3, Issue 11
  • DOI: 10.1038/nmat1211

Templated Self-Assembly of Block Copolymers: Top-Down Helps Bottom-Up
journal, October 2006

  • Cheng, J. Y.; Ross, C. A.; Smith, H. I.
  • Advanced Materials, Vol. 18, Issue 19, p. 2505-2521
  • DOI: 10.1002/adma.200502651

Block Copolymer Assembly via Kinetic Control
journal, August 2007


Self-assembly of block copolymers
journal, January 2012

  • Mai, Yiyong; Eisenberg, Adi
  • Chemical Society Reviews, Vol. 41, Issue 18
  • DOI: 10.1039/c2cs35115c

The extended Q -range small-angle neutron scattering diffractometer at the SNS
journal, July 2010


Mantid—Data analysis and visualization package for neutron scattering and μ SR experiments
journal, November 2014

  • Arnold, O.; Bilheux, J. C.; Borreguero, J. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764
  • DOI: 10.1016/j.nima.2014.07.029

Spontaneous unilamellar polymer vesicles in aqueous solution
journal, January 2014

  • Kim, Tae-Hwan; Song, Chaeyeon; Han, Young-Soo
  • Soft Matter, Vol. 10, Issue 3
  • DOI: 10.1039/C3SM52519H

Anomalistic Self-Assembled Phase Behavior of Block Copolymer Blended with Organic Derivative Depending on Temperature
journal, August 2016


    Works referencing / citing this record:

    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
    • DOI: 10.3390/mi9100505