Substituent-induced delocalization effects on hydrogen-bonding interaction in poly(N-phenyl methacrylamide) derivatives

Shiao Wei Kuo*, Chien Ting Lin, Jem Kun Chen, Fu-Hsiang Ko, Feng Chih Chang, Kwang Un Jeong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Within small molecules, the hydrogen-bonding behaviors affected by delocalization have been studied thoroughly, but rare publication in macromolecules. Therefore, three poly(N-phenyl methacrylamide)s, poly(N-phenyl methacrylamide) (PNPAA), poly(N-4-methoxyphenyl methacrylamide) (PMPMA) and poly(N-4-bromophenyl methacrylamide) (PBPMA), with different inductive substitution at para position of benzene ring are prepared to investigate the substituent-induced delocalization effects on the hydrogen-bonding interaction behaviors. In this study, the variable-temperature FTIR spectrum is used as tool to study the self- and inter-association hydrogen-bonding interaction. FTIR analyses could provide evidences that there is relatively stronger inter-associative hydrogen bonding in poly(N-4-bromophenyl methacrylamide)/P4VP blends. High resolution 13C CP/MAS solid-state NMR analyses indicate that the spin-lattice relaxation time (T1ρH) in all PBPMA blends are homogeneous on the scale at which spin-diffusion occurs within the time T1ρH, also due to the enhancement by substituent inductive delocalization.

Original languageEnglish
Pages (from-to)2600-2608
Number of pages9
Journalpolymer
Volume52
Issue number12
DOIs
StatePublished - 26 May 2011

Keywords

  • Hydrogen bonding
  • Miscibility
  • Polymer blend

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