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Home  >  Journal list  >  Polymer Journal  >  Vol.13  No.9 (1981)  >  pp.879-888

Polymer Journal
<<Previous article Vol.13  No.9 (1981)   pp.879 - 888 Next article>>

Radial Distribution Function Study for Ethylene–Propylene Random Copolymer by X-Ray Diffraction Method

Mikio Numakawa1) and Akira Odajima1)
1) Department of Applied Physics, Faculty of Engineering, Hokkaido University

ABSTRACT:  The local chain conformation and packing in the amorphous solid of a polymer were determined for ethylene–propylene random copolymer (EPRC) by the analysis of the radial distribution function (RDF) obtained from X-ray diffraction measurement at room temperature. A new method was devised for removing the contribution of H atoms to the observed RDF in such a polyatomic system consisting of C and H atoms, and the C-C pair RDF for EPRC was derived. From the C-C pair RDF, the number of intrachain and interchain atoms were obtained. From this result, it was found that the amorphous bulk state and the isolated state in θ-solvent are nearly equal in the conformational probabilities for trans and gauche states in the EPRC chain.


Keyword:
Radial Distribution Function/ Ethylene–Propylene Random Copolymer/ Amorphous Solid/ C-2H System/ C-C Pair RDF/ Conformation/ Chain Packing

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

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