ASTM D4883 - 18 - Standard Test Method for Density of Polyethylene by the Ultrasound Technique

ASTM D4883 - 18

Standard Test Method for Density of Polyethylene by the Ultrasound Technique

Status : Current   Published : November 2018

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PDF

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HARDCOPY



1.1 This test method covers the determination of the density of polyethylene through the utilization of ultrasound equipment.

1.2 This test method is based on the distinct behaviors of the amorphous and crystalline phases of polyethylene in response to ultrasound. Polyethylene shall be viewed as a composite structure where high-density crystalline regions are connected by lower-density amorphous material. The ratio of crystalline to amorphous material determines the final density of the material. The amorphous and crystalline phases exhibit very distinct behaviors with regard to the propagation of sound waves. The propagation characteristics in the composite will depend on the relative amount of the two phases (the degree of crystallinity).

1.3 Inorganic materials increase density as measured by Test Methods D792 and D1505, but they have little or no effect on ultrasonic density. The ultrasonic measurement is basically a base resin density.

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

1.5  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 1:  There is no known ISO equivalent to this standard.

1.6  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.




Standard NumberASTM D4883 - 18
TitleStandard Test Method for Density of Polyethylene by the Ultrasound Technique
StatusCurrent
Publication Date01 November 2018
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors amorphous, crystalline, density, molded, plaques, polyethylene, sonic, ultrasonic, ultrasound
ICS83.080.20
PublisherASTM
FormatA4
DeliveryYes
Pages4
File Size79 KB
Price£36.00


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