CHARACTERIZATION OF LOCAL ORDER IN ATACTIC POLYSTYRENE USING 2-DIMENSIONAL NUCLEAR-MAGNETIC-RESONANCE AND ATOMISTIC SIMULATIONS

Authors
ROBYR P TOMASELLI M GROBPISANO C MEIER BH ERNST RR SUTER UW
Citation
P. Robyr et al., CHARACTERIZATION OF LOCAL ORDER IN ATACTIC POLYSTYRENE USING 2-DIMENSIONAL NUCLEAR-MAGNETIC-RESONANCE AND ATOMISTIC SIMULATIONS, Macromolecules, 28(15), 1995, pp. 5320-5324
Citations number
12
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecules → ACNP
ISSN journal
00249297
Volume
28
Issue
15
Year of publication
1995
Pages
5320 - 5324
Database
ISI
SICI code
0024-9297(1995)28:15<5320:COLOIA>2.0.ZU;2-P
Abstract
The local ordering of the phenyl groups in amorphous atactic polystyre ne is investigated by radio-frequency-driven carbon-13 NMR polarizatio n transfer (spin diffusion) between site-selectively carbon-13 labeled monomer units. The NMR data agree with atomistic simulations of atact ic amorphous polystyrene where orientational correlations among the ph enyl rings do not extend over distances larger than 5 Angstrom. This f inding is at variance with earlier X-ray and neutron diffraction measu rements.