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Scope

1.1 This test method covers and is applicable to the determination of dicumyl peroxide and the decomposition products dimethylbenzyl alcohol and acetophenone in cured and uncured polyethylene (PE) and ethylene vinyl acetate (EVA) resins. These uncured polymers normally contain from 1 to 2 % dicumyl peroxide, whereas the residual peroxide level in the cured polymers is usually less than 0.1 %.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.3 Review the current Material Safety Data Sheets (MSDS) for detailed information concerning toxicity, first aid procedures, and safety precautions.

1.4 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 determine the applicability of regulatory limitations prior to use. Specific hazards are given in Section 7.

Significance and Use

Knowledge of the peroxide content of uncured PE and EVA samples is required to regulate the degree of crosslinking in the cured product. As end use applications of the cured product can be affected by residual amounts of the peroxide or its decomposition products—dimethylbenzyl alcohol and acetophenone—knowledge of these levels is also important. This test method provides a procedure for determining the concentration of these compounds. A method for the HPLC assay of dicumyl peroxide is described in Test Method E 755.

Keywords

acetophenone; dicumyl peroxide; dimethylbenzyl alcohol; ethylene-vinyl acetate copolymers; high performance liquid chromatograph; HPLC; polyethylene; resins; Sampling plastics/plastic products; Sampling chemicals; Uncured polyethylene (PE) plastics; Acetophene; Cured polyethylene (PE); Decomposition; Dicumyl peroxide; Dimethylbenzene alcohol; Ethylene-vinyl acetate (EVA) copolymer; Liquid chromatography (LC); Peroxides; Polyethylene (PE); Polymers; Resins; ICS Number Code 83.080.10 (Thermosetting materials)

To find similar documents by ASTM Volume:

06.04 (Paint -- Solvents; Aromatic Hydrocarbons)

15.05 (Engine Coolants; Halogenated Organic Solvents and Fire Extinguishing Agents; Industrial and Specialty Chemicals)

To find similar documents by classification:

83.080.10 (Thermosetting materials Including ebonite Silicones, see 71.100.55)

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