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ASTM F2778

Standard Test Method for Measurement of Percent Crystallinity of Polyetheretherketone (PEEK) Polymers by Means of Specular Reflectance Fourier Transform Infrared Spectroscopy (R-FTIR)

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Organization: ASTM
Publication Date: 15 November 2009
Status: inactive
Page Count: 4
scope:

This test method describes the collection of absorption spectra of polyetheretherketone (PEEK) polymer in filled and unfilled grades, as supplied by a vendor, and the subsequent calculation of the percent crystallinity. The material is evaluated by infrared spectroscopy. The intensity (height) of the absorbance peaks is related to the amount of crystalline regions present in the material.

This test method can be used for PEEK consolidated forms, such as injection molded parts, as long as the samples are optically flat and smooth.

The applicability of the infrared method to industrial and medical grade PEEK materials has been demonstrated by scientific studies.2, 3 Percentage of crystallinity is related to R-FTIR measurement by calibration through wide-angle x-ray scattering (WAXS) crystallinity measurements.2, 3 It is anticipated that this test method, involving the peak heights near 1305 cm-1 and 1280 cm-1, will be evaluated in an Interlaboratory Study (ILS) conducted according to Test Method E691.

This test method does not suggest a desired range of crystallinity for specific applications.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2 Chalmers J. M., Everall, N. J., Hewitson, K., Chesters, M. A., Pearson, M., Grady, A., Kuzicka, B., "Fourier Transform Infrared Microscopy: Some Advances in Techniques for Characterisation and Structure-Property Elucidations of Industrial Material," The Analyst, Vol 23, 1998, pp. 579-586.

3 Jaekel, D. J., Medel, F. J., Kurtz, S. M., "Validation of Crystallinity Measurements of Medical Grade PEEK Using Specular Reflectance FTIR-microscopy," Society of Plastics Engineers Annual Technical Conference 2009, Chicago 2009, Manuscript ID ANTEC-0248-2009.

Document History

November 15, 2009
Standard Test Method for Measurement of Percent Crystallinity of Polyetheretherketone (PEEK) Polymers by Means of Specular Reflectance Fourier Transform Infrared Spectroscopy (R-FTIR)
This test method describes the collection of absorption spectra of polyetheretherketone (PEEK) polymer in filled and unfilled grades, as supplied by a vendor, and the subsequent calculation of the...
November 15, 2009
Standard Test Method for Measurement of Percent Crystallinity of Polyetheretherketone (PEEK) Polymers by Means of Specular Reflectance Fourier Transform Infrared Spectroscopy (R-FTIR)
This test method describes the collection of absorption spectra of polyetheretherketone (PEEK) polymer in filled and unfilled grades, as supplied by a vendor, and the subsequent calculation of the...
ASTM F2778
November 15, 2009
Standard Test Method for Measurement of Percent Crystallinity of Polyetheretherketone (PEEK) Polymers by Means of Specular Reflectance Fourier Transform Infrared Spectroscopy (R-FTIR)
This test method describes the collection of absorption spectra of polyetheretherketone (PEEK) polymer in filled and unfilled grades, as supplied by a vendor, and the subsequent calculation of the...

References

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