ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
An x-ray diffraction method is described for the determination of per cent crystallinity in oriented films and fibers of polyethylene terephthalate by using an x-ray diffractometer in association with a scaler counter. Results are presented to show that sample rotation approximately averages out the crystallite orientation effects. Results are presented on per cent crystallinity and specific volume of a number of films and fibers of polyethylene terephthalate possessing different degrees of crystallinity. A linear specific volume-x-ray crystallinity correlation is found. Extrapolation to zero and 100% crystallinity gives values of specific volume for amorphous and crystalline polyethylene terephthalate in good agreement with the measured specific volume of amorphous polymer and the specific volume calculated from the x-ray crystal structure analysis made by Bunn2 for crystalline polyethylene terephthalate.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1959.070020514
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