ASTM-F1164 Standard Test Method for Evaluation of Transparent Plastics Exposed to Accelerated Weathering Combined with Biaxial Stress

ASTM-F1164 - 1997 R14 EDITION - CURRENT
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Standard Test Method for Evaluation of Transparent Plastics Exposed to Accelerated Weathering Combined with Biaxial Stress
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Scope

1.1 This test method covers the resistance of transparent plastics exposed to environmental conditioning (accelerated weathering) under a biaxial stress state induced by a pressure cell/test fixture.

1.2 The values stated in acceptable metric units are to be regarded as the standard.

1.3 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.

Significance and Use

4.1 The degradation of optical properties of transparent plastics is the single greatest cause for in-service removal and replacement. Some optical qualities are inherent in the geometry, manufacturing process, and materials, and remain relatively unchanged after manufacture, while others are subject to gradual change during exposure to the service environment. Factors having an influence on the crazing of transparent plastics include stress, ultraviolet (UV), moisture, and temperature. Sufficient data has been generated to make it evident that real-world conditioning must be experienced by developmental test specimens, as opposed to testing new unexposed material to determine durability, prior to in-service usage. However, the laboratory simulation of natural weathering, and especially accelerated simulation, is imprecise and correlation of results obtained for different plastics or from using different exposure apparatus should not be attempted until a valid database has been generated for such cross-correlation.

Keywords

accelerated weathering; biaxial stress; coating adhesion; crazing; transparent plastics ;; ICS Number Code 83.080.01 (Plastics in general)

To find similar documents by ASTM Volume:

15.03 (Space Simulation; Aerospace and Aircraft; Composite Materials)

To find similar documents by classification:

83.080.01 (Plastics in general)

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Document Number

ASTM-F1164-97(2014)

Revision Level

1997 R14 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Dec. 15, 2014

Document Type

Test Method

Page Count

4 pages

Committee Number

F07.08