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An Independent Measurement of the Amorphous Content of Polymers by R. G. J. Miller; H. A. Willis is a Materials Science article available to read on EtoBox.

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## Abstract Attempts have been made, particularly by American workers, to exploit differences in crystalline and amorphous polymer spectra to determine crystalline/amorphous ratios. In most published work authors have been forced to rely on calibration by other methods, especially density. They have justified the use of the spectroscopic method principally on the grounds of speed in obtaining results. We propose a spectroscopic method, applicable to a number of polymers, which is entirely independent of other measurements. We are thus able to compare our results with those obtained by other methods and have in some cases been able to draw useful conclusions from apparent anomalies. Our method depends upon measurement of pure amorphous bands. We consider these to arise from the multiplicity of rotational isomers present in the amorphous phase. The pure amorphous spectrum of many polymers can be obtained, and by this means an absolute calibration of amorphous content is possible. Crystalline bands cannot be so calibrated; they are dangerous to use quantitatively, although superficially more attractive because of their sharpness. The application of the method to some common polymers i

Who reads An Independent Measurement of the Amorphous Content of Polymers?

Author

R. G. J. Miller; H. A. Willis

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley (ISSN 0022-3832)

Published

1956

Language

EN

Field

Materials Science (Physical Sciences)