Subglass and Glass Transitions of Poly(di-n-alkylitaconate)s with Various Side-Chain Lengths: Solid-State NMR Investigation

Autor:	Françoise Lauprêtre, † and A.-C. Genix
Rok vydání:	2006
Předmět:	Polymers and Plastics Chemistry Organic Chemistry Relaxation (NMR) Dielectric Carbon-13 NMR Inorganic Chemistry Crystallography Dipole Nuclear magnetic resonance Solid-state nuclear magnetic resonance Materials Chemistry Side chain Anisotropy Magnetic dipole–dipole interaction
Zdroj:	Macromolecules. 39:7313-7323
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma060730c
Popis:	Variable-temperature high-resolution solid-state 13 C NMR experiments were performed on poly-(di-n-alkylitaconate)s in bulk. Temperature-dependent line broadenings resulting from either motional modulation of the 13 C- 1 H dipolar coupling or motional modulation of the chemical shift anisotropy were observed for each carbon atom of the polymer main chain and side chains. Similarly, independent determinations of the 13 C- 1 H dipolar couplings and 13 C chemical shift anisotropies demonstrated the existence of local motions in solid poly-(di-n-alkylitaconate)s. All of these measurements led to a direct identification of the moving units that are involved in the various relaxations, which were previously investigated by using dielectric relaxation experiments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::62a82a2db23548366a5f086b8fc4f4ed https://doi.org/10.1021/ma060730c Zobrazit plný text záznamu