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Home  >  Journal list  >  Polymer Journal  >  Vol.14  No.5 (1982)  >  pp.411-422

Polymer Journal
<<Previous article Vol.14  No.5 (1982)   pp.411 - 422 Next article>>

X-Ray Study of the Substitution Effect in Poly[γ-(o-chlorobenzyl) L-glutamate], Poly[γ-(m-chlorobenzyl) L-glutamate], and Poly[γ-(p-chlorobenzyl) L-glutamate] in the Solid State

Masatoshi Osanai1) and Kunio Hikichi1)
1) Department of Polymer Science, Faculty of Science, Hokkaido University

ABSTRACT:  X-Ray diffraction measurements were made on fibers of poly[γ-(o-chlorobenzyl) L-glutamate], poly[γ-(m-chlorobenzyl) L-glutamate], and poly[γ-(p-chlorobenzyl L-glutamate]. All reflections of the poly[γ-(o-chlorobenzyl) L-glutamate] fibers were indexed on an orthorhombic lattice of a=26.50 Å. b=30.60 Å, and c=27.02 Å. The observed density was 1.367 g cm−3 as compared with the calculated value of 1.382 g cm−3. All reflections of the poly[γ-(m-chlorobenzyl) L-glutamate] fibers were indexed on a hexagonal lattice of a=b=15.50 Å and c=27.10 Å. The observed density of 1.356 g cm−3 was larger than the calculated value of 1.343 g cm−3. All reflections of the poly[γ-(p-chlorobenzyl) L-glutamate] fibers were indexed on an orthorhombic lattice of a=15.24 Å, b=26.40 Å, and c=10.67 Å. The observed density of 1.362 g cm−3 was comparable with the calculated value of 1.371 g cm−3. By applying the methods of the cylindrical Patterson map and equatorial Fourier map, the position of the chlorine atom at the end of the side chain was estimated. The results obtained indicated that the radial distance of the chlorine atom from the helix axis is about 4 Å, 6 Å, and 10 Å for poly[γ-(o-chlorobenzyl) L-glutamate], poly[γ-(m-chlorobenzyl) L-glutamate], and poly[γ-(p-chlorobenzyl) L-glutamate], respectively. These results are interpreted in terms of side chain conformation.


Keyword:
Poly[γ-(o-chlorobenzyl) L-glutamate]/ Poly[γ-(m-chlorobenzyl) L-glutamate]/ Poly[γ-(p-chlorobenzyl) L-glutamate]/ X-Ray Diffraction/ Cylindrical Patterson Map/ Equatorial Fourier Map

Published online: March 03, 2006
© Copyright, 2006 by The Society of Polymer Science, Japan

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