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Norma ASTM D5576-00(2021)e1 15.1.2021 náhled

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ASTM D5576-00(2021)e1

Standard Practice for Determination of Structural Features in Polyolefins and Polyolefin Copolymers by Infrared Spectrophotometry (FT-IR) (Includes all amendments and changes 2/10/2021).

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NORMA vydána dne 15.1.2021

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Informace o normě:

Označení normy: ASTM D5576-00(2021)e1
Datum vydání normy: 15.1.2021
Kód zboží: NS-1016994
Počet stran: 3
Přibližná hmotnost: 9 g (0.02 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM

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Anotace textu normy ASTM D5576-00(2021)e1 :

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.

Keywords:

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

Doplňující informace

1. 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.

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Note 2:?There is no known ISO equivalent to this standard.

1.3?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

2. Referenced Documents

D5594-18a	Standard Test Method for Determination of the Vinyl Acetate Content of Ethylene-Vinyl Acetate (EVA) Copolymers by Fourier Transform Infrared Spectroscopy (FT-IR) (Includes all amendments and changes 8/22/2023).
D1505-18	Standard Test Method for Density of Plastics by the Density-Gradient Technique
E131-10(2023)	Standard Terminology Relating to Molecular Spectroscopy
E168-16(2023)	Standard Practices for General Techniques of Infrared Quantitative Analysis
E932-89(2021)	Standard Practice for Describing and Measuring Performance of Dispersive Infrared Spectrometers
D2238-22	Standard Test Methods for Absorbance of Polyethylene Due to Methyl Groups at 1378 cm?1
D3124-98(2019)	Standard Test Method for Vinylidene Unsaturation in Polyethylene by Infrared Spectrophotometry
D3594-93(2000)	Standard Test Method for Copolymerized Ethyl Acrylate In Ethylene-Ethyl Acrylate Copolymers
E1421-99(2021)	Standard Practice for Describing and Measuring Performance of Fourier Transform Mid-Infrared (FT-MIR) Spectrometers: Level Zero and Level One Tests
IEEE/ASTM?SI-10	Standard for Use of the International System of Units (SI): The Modern System
D6248-21	Standard Test Method for Vinyl and Trans Unsaturation in Polyethylene by Infrared Spectrophotometry
D883-24	Standard Terminology Relating to Plastics
D1600-18	Standard Terminology for Abbreviated Terms Relating to Plastics (Withdrawn 2024)

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