ISSN:
0323-7648
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
13C CP/MAS NMR spectra of 10% 13C-labeled polyethylene adsorbed on the surface of silica gel were measured by means of high-resolution solid-state 13C NMR. From these experimental results, it was found that adsorbed polyethylene has immobile and mobile parts. In the immobile part, the polyethylene takes the trans conformation as the major conformation and gauche as the minor conformation, and in the mobile part fast transition between trans and gauche conformations occurs. Futhermore, in order to elucidate the dynamics of the polyethylene, 13C spin-lattice relaxation times T1 were measured. It was found that the molecular motion of the polyethylene in the mobile part is strongly restricted, compared with the noncrystalline component of polyethylene in bulk.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/actp.1995.010460603
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