Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films
- Authors
- Jo, Kyoung-Il; Oh, Younghoon; Kim, Tae-Ho; Bang, Joona; Yuan, Guangcui; Satija, Sushil K.; Sung, Bong June; Koo, Jaseung
- Issue Date
- 20-10월-2020
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS MACRO LETTERS, v.9, no.10, pp.1483 - 1488
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS MACRO LETTERS
- Volume
- 9
- Number
- 10
- Start Page
- 1483
- End Page
- 1488
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/52426
- DOI
- 10.1021/acsmacrolett.0c00608
- ISSN
- 2161-1653
- Abstract
- The morphological structure and dynamics of confined polymers adjacent to the polymer-polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of poly(methyl methacrylate) (PMMA) melts confined between polystyrene (PS) layers using neutron reflectivity. Combinations of various thicknesses of PMMA and deuterated PMMA (dPMMA allowed us to experimentally reveal the nonmonotonic behavior of polymer mobility near the PS-PMMA interface. From the neutron reflectivity results, we found that the polymers adjacent to the immiscible polymer-polymer interface showed enhanced diffusion dynamics because of the repulsive interaction between PS and PMMA, whereas the polymer at local regions farther from the interface exhibited reduced dynamics. This is probably due to the nonspherical conformation of PMMA and spatial confinement near the PS-PMMA interface.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.