Supporting data for Star-to-bottlebrush transition in extensional and shear deformation of unentangled polymer melts
Loading...
Persistent link to this item
Statistics
View StatisticsCollection period
2021-06-01
2022-05-01
2022-05-01
Date completed
2022-08-01
Date updated
Time period coverage
Geographic coverage
Source information
Journal Title
Journal ISSN
Volume Title
Title
Supporting data for Star-to-bottlebrush transition in extensional and shear deformation of unentangled polymer melts
Published Date
2023-03-15
Author Contact
Bates, Frank S
bates001@umn.edu
bates001@umn.edu
Type
Dataset
Abstract
These files contain primary data along with associated output from instrumentation supporting all results reported in Zografos et al. "Star-to-bottlebrush transition in extensional and shear deformation of unentangled polymer melts." A series of model poly((±)-lactide) (PLA) graft copolymers were synthesized using ring-opening metathesis polymerization and used to probe the star-to-bottlebrush transition in shear and extensional flows. Ten samples with backbone degrees of polymerization 10 < Nbb < 430, each containing one PLA side chain of length Nsc = 72 per two backbone repeat units, were investigated using small-amplitude oscillatory shear (SAOS) and extensional rheometry measurements. The star-like to bottlebrush transition was identified at Nbb = 50-70 using SAOS. In extension, melt strain hardening is absent in the star-like melts (Nbb < 50) but is prominent in the bottlebrush limit (Nbb > 70). The onset of melt strain hardening occurs at a timescale equivalent to the Rouse time of the backbone. A molecular interpretation of these results builds upon recent speculation related to strain-induced increases in interchain friction in bottlebrush polymers. These findings will be useful in designing bottlebrush melts to strain harden, which is critical in various types of processing methods involving extensional flows, including foaming, 3D printing, and film-blowing.
Description
The data folder contains all rheology data (SAOS, steady shear, extensional), as well as differential scanning calorimetry, small-angle x-ray scattering, and size-exclusion chromatography data. Nomenclature is consistent with that used in the manuscript. See the readme.txt file for further details.
Referenced by
https://doi.org/10.1021/acs.macromol.3c00015
Related to
Replaces
Publisher
Funding information
National Science Foundation, CHE-1901635
National Science Foundation, DGE-1839286
National Institutes of Health, S10OD011952
U.S. Department of Energy Office of Science, DE-AC02-06CH11357
National Science Foundation, DGE-1839286
National Institutes of Health, S10OD011952
U.S. Department of Energy Office of Science, DE-AC02-06CH11357
item.page.sponsorshipfunderid
item.page.sponsorshipfundingagency
item.page.sponsorshipgrant
Previously Published Citation
Suggested citation
Zografos, Aristotelis; All, Helena A; Chang, Alice B; Hillmyer, Marc A; Bates, Frank S. (2023). Supporting data for Star-to-bottlebrush transition in extensional and shear deformation of unentangled polymer melts. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/y7as-3w53.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.