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ASTM International, 04/01/2013
Publisher: ASTM
File Format: PDF
$27.00$54.00
Published:01/04/2013
Pages:3
File Size:1 file , 72 KB
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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.
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
Vinylidene
888
D3124
Vinyl acetate
609
D5594
1020
3270
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.
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