Unusual Thermal Properties of Certain Poly(3,5-disubstituted styrene)s

Jai Hyun Koh, Qingjun Zhu, Yusuke Asano, Michael J. Maher, Heonjoo Ha, Sung Soo Kim, Henry L. Cater, Emmanuel U. Mapesa, Joshua R. Sangoro, Christopher J. Ellison, Nathaniel A. Lynd, C. Grant Willson

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

During the course of studying silicon-containing diblock copolymers, it was discovered that poly(3,5-di(trimethylsilyl)styrene)-block-poly(3,4-methylenedioxystyrene) (PDTMSS-b-PMDOS) showed very unusual thermal properties. The material can be recovered as a free-flowing powder despite heating above 250 °C. To better understand this behavior, homopolymers of the 3,5-disubstituted styrenes, poly(3,5-di(trimethylsilyl)styrene) (PDTMSS) and poly(3,5-di-tert-butylstyrene) (PDtBS), were prepared. These polymers are soluble in common organic solvents and formed clear, glassy thin films upon spin coating. These homopolymers were studied by differential scanning calorimetry (DSC), broadband dielectric spectroscopy (BDS), dynamic mechanical analysis (DMA), and temperature-programmed ellipsometry. These experiments document the lack of a conventional glass transition in these materials below their decomposition temperature. A series of statistical copolymers of PDTMSS and PDtBS with styrene was synthesized and studied by DSC in an attempt to establish the Tg of the homopolymers by model-based extrapolation.

Original languageEnglish (US)
Pages (from-to)5504-5511
Number of pages8
JournalMacromolecules
Volume53
Issue number13
DOIs
StatePublished - Jul 14 2020

Bibliographical note

Funding Information:
The authors are grateful for financial support from The Rashid Engineering Regents Chair, The Welch Foundation (Grant No. F-1830), Nissan Chemical Company, and Kwanjeong Educational Foundation. E.U.M. and J.R.S. acknowledge financial support from National Science Foundation through DMR-1508394.

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Fingerprint

Dive into the research topics of 'Unusual Thermal Properties of Certain Poly(3,5-disubstituted styrene)s'. Together they form a unique fingerprint.

Cite this