Dielectric Relaxation and Rheological Behavior of Supramolecular Polymeric Liquid

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Macromolecules

DOI:https://doi.org/10.1021/ma400088w· OSTI ID:1089260

Lou, Nan ^[1]; Wang, Yangyang ^[2]; Li, Xiaopeng ^[3]; Li, Haixia ^[4]; Wang, Ping ^[5]

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1. Shanghai Jiao Tong University, China
2. ORNL
3. University of Akron, Akron, Ohio
4. Shanghai Jiao Tong University, Shanghai China
5. Dow Chemicals Company Limited, Shanghai China

A model self-complementary supramolecular polymer based on thymine and diamidopyridine triple hydrogen-bonding motifs has been synthesized, and its dielectric and rheological behavior has been investigated. The formation of supramolecular polymers has been unequivocally demonstrated by nuclear magnetic resonance, electrospray ionization mass spectrometry with traveling wave ion mobility separation, dielectric spectroscopy, and rheology. The dynamical behaviors of this associating polymer generally conform to those of type-A polymers, with a low-frequency chain relaxation and a high-frequency relaxation visible in both rheological and dielectric measurements. The dielectric chain relaxation shows the ideal symmetric Debye-like shape, resembling the peculiar features of hydrogen-bonding monoalcohols. Detailed analysis shows that there exists a weak decoupling between the mechanical terminal relaxation and dielectric Debye-like relaxation. The origin of the Debye-like dielectric relaxation is further discussed in the light of monoalcohols.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1089260
• Journal Information: Macromolecules, Vol. 46, Issue 8; ISSN 0024--9297
• Country of Publication: United States
• Language: English