DYNAMIC X-RAY DIFFRACTOMETER FOR MEASURING RHEO-OPTICAL BEHAVIOR OF CRYSTALS IN POLYMER SOLIDS

A dynamic x-ray diffraction technique to follow the responses of polymer crystals, one of the structural units of crystalline high-polymeric materials, to mechanical excitation of sinusoidal strain induced to bulk specimen, is described. The descriptions for such responses are made in terms of the i...

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Bibliographic Details
Main Authors: Kawaguchi,Tatsuro, Keedy,Daniel A, Stein,Richard S, Ito,Taisuke, Oda,Takashi
Format: Report
Language:English
Subjects:
CRYSTAL LATTICES
CRYSTALS
DEFORMATION
EQUATIONS
Physical Chemistry
POLYMERS
RELAXATION TIME
X RAY DIFFRACTION
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Summary:A dynamic x-ray diffraction technique to follow the responses of polymer crystals, one of the structural units of crystalline high-polymeric materials, to mechanical excitation of sinusoidal strain induced to bulk specimen, is described. The descriptions for such responses are made in terms of the in-phase and out-of-phase components of the diffracted intensity by the crystals. From these, one may obtain the change in orientation of reciprocal lattice vector and deformation of lattice spacing of specific crystal planes with the change in the external periodic strain. The photoelectric switching circuits are described which activate repetitively four sets of scalers to count the continuously fed signals of the detected x-ray at particular strain phase intervals for each. The dynamic diffraction by the crystals can be evaluated by comparing the accumulated intensities among the four scalers. (Author) Prepared in cooperation with Kyoto Univ. (Japan). Dept. of Polymer Chemistry.