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ASTM International - ASTM D5576-00(2013)

Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)

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Organization: ASTM International
Publication Date: 1 April 2013
Status: inactive
Page Count: 3
ICS Code (Thermoplastic materials): 83.080.20
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 Tables 1 and 2. TABLE 1 Polyolefin Structural Features Determined by FT-IR

Structure Absorption Band, cm

-1

ASTM Test Method
Methyl group (polyethylene) 1378

D2238

Methyl group (eth-prop copol) 1380  
Pendant methyl 935  
Terminal vinyl 908

D6248

Trans-vinylene 965

D6248

Vinylidene 888

D3124


TABLE 2 Structural Features in Polyolefin Copolymer Determined by FT-IR

Structure Absorption Band, cm

-1

ASTM Test Method
Vinyl acetate 609

D5594

  1020

D5594

  3270

D5594

Styrene 770-700  
  1600-1500  
Ethyl acrylate 1640-1730  
  862

D3594

Ethylene acrylate 1280-1200  
  1640-1625  

1.2 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 known ISO equivalent to this standard.

abstract:

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... View More

Document History

January 15, 2021
Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)
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...
ASTM D5576-00(2013)
April 1, 2013
Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)
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...
September 1, 2006
Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)
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...
March 10, 2000
Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectroscopy (FT-IR)
1.1 This practice describes infrared procedures for determining the molecular structural entities in the polyolefin chains (their quantitative levels with internal (Procedure A) and external...
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