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Investigation of Chain Dynamics in Poly( n ‐alkyl methacrylate)s by Solid‐State NMR: Comparison with Poly( n ‐alkyl acrylate)s
Author(s) -
Gaborieau Marianne,
Graf Robert,
Spiess Hans Wolfgang
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800314
Subject(s) - alkyl , polymer chemistry , acrylate , chain (unit) , relaxation (psychology) , molar mass , chemistry , methacrylate , side chain , solid state , molecular dynamics , polymer , solid state nuclear magnetic resonance , materials science , crystallography , computational chemistry , polymerization , copolymer , organic chemistry , nuclear magnetic resonance , physics , psychology , social psychology , astronomy
PnAMAs exhibit a local nanophase separation associated with intriguing chain dynamics ( Macromol. Chem. Phys . 2005 , 206 , 142). PnAMAs of high molar mass, as determined by SEC and MHKS parameters, were investigated in the melt with a recently‐developed solid‐state NMR method (NOE with dipolar filter; Solid State Nucl. Magn. Res . 2005 , 28 , 160). The correlation times are assigned to the relaxation of the alkyl nanodomains, as coupled motions of the main chain and hindered local modes in the side chain. Comparison with poly( n ‐alkyl acrylates) shows a higher anisotropy of the main chain motions and a better organized local nanophase separation in PnAMAs.