ASTM-D5576 › Historical Revision Information
Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)

ASTM-D5576 - 2000 R06 EDITION - SUPERSEDED
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This practice covers infrared spectrophotometry procedures for determining the molecular structural features such as types and number of branches in polyolefins and polyolefin copolymers. The structural features expressed by these determinations affect the ultimate polymeric properties and are useful in showing correlations with many performance properties. The apparatus is comprised of double beam or Fourier transform infrared spectrophotometer, hot plate, microscope slides, compression molding press, metal plates, brass shims, micrometer, and film mounts. Materials shall include polyethylene terephthalate, aluminum, or matte finished teflon-fiberglass sheet. The concentration shall be calculated using either the Beer-Lambert law with the appropriate molar absorptivity or an appropriate calibration curve.

ORDER

Scope

1.1 This practice covers infrared procedures for determining the molecular structural features in polyolefins and polyolefin copolymers. The structural features of primary concern are the types and numbers of branches. Although this practice centers its attention on polyolefins and polyolefin copolymers, the techniques, with proper modification, can be used for some other polymers as well.

Note 1

Quantitative determinations require either an internal or an external evaluation of sample thickness. ASTM test methods available for specific features are listed in .

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 to determine the applicability of the regulatory limitations prior to use.

Note 2

There is no similar or equivalent ISO standard.

Keywords

copolymers; FT-IR; infrared spectrophotometry; polyethylene; structural features; ICS Number Code 83.080.20 (Thermoplastic materials)

To find similar documents by ASTM Volume:

08.03 (Plastics (III): D5117 - latest; Reinforced Plastic Piping Systems and Chemical Equipment; Plastic Building Products)

To find similar documents by classification:

83.080.20 (Thermoplastic materials)

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Document Number

ASTM-D5576-00(2006)

Revision Level

2000 R06 EDITION

Status

Superseded

Modification Type

Reapproval

Publication Date

Sept. 1, 2006

Document Type

Practice

Page Count

3 pages

Committee Number

D20.70