Segmental relaxation of sequence defined polymers

Bichler, Karin J.; Jakobi, Bruno; Schneider, Gerald J.

doi:10.1088/1361-648x/ad11aa

Title: Segmental relaxation of sequence defined polymers

Journal Article · 10 December 2023 · Journal of Physics. Condensed Matter

DOI: https://doi.org/10.1088/1361-648x/ad11aa · OSTI ID:2267650

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Louisiana State Univ., Baton Rouge, LA (United States); Louisiana State University
Louisiana State Univ., Baton Rouge, LA (United States)

For this work, the dynamical behavior of sequence defined polymers, P(C_nEG₄), was studied using dielectric spectroscopy showing one segmental relaxation in addition to a secondary relaxation. In case of segmental relaxation, the relaxation times strongly depend on the molecular weight at low temperatures, while at higher temperatures, unlike to linear homo polymers, this effect levels out. With increasing length of C-units, the segmental relaxation accelerates. This is also reflected in the glass transition temperature, extracted from dielectric spectroscopy. With increasing length of C-units the glass transition temperature decreases, compatible with the accelerated segmental relaxation.

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Research Organization:: Louisiana State University, Baton Rouge, LA, United States

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0019050

OSTI ID:: 2267650

Journal Information:: Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 11 Vol. 36; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
segmental relaxation
sequence defined polymer
dielectric spectroscopy

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