ASTM-D5576 2013

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D5576-00(2013) Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR)

Published By	Publication Date	Number of Pages
ASTM	2013	3

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Categories: 83.080.20 - Thermoplastic materials, ASTM

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Description

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

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

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.

Additional information

	16401625
Trans-vinylene	965
Vinylidene	888
Ethyl acrylate	16401730
Terminal vinyl	908
Styrene	770700
Methyl group (eth-prop copol)	1380
Methyl group (polyethylene)	1378
Structure	Absorption Band, cm 1
Vinyl acetate	609
Ethylene acrylate	12801200
Pendant methyl	935
ICS Codes	83.080.20 - Thermoplastic materials

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ASTM-D5576 2013

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