ASTM D Standard Practice for Heat Aging of Plastics Without Load 1 1 x00a0 This practice is intended to define the exposure conditions for evaluating. Standard Practice for Heat Aging of Plastics Without Load – ASTM D Status: Withdrawn · Replaced by: ASTM D Buy this standard. Price: . ASTM D(). Standard Practice for Heat Aging of Plastics Without Load. standard by ASTM International, 03/15/ This document has been.
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Mechanical properties, such as flexural properties, are sensitive to heat degradation and may change at a more rapid rate.
Therefore, for any application of the CUT or the TI temperature index to be valid, either the thermal aging program must duplicate the intended thermal exposure conditions of the end product, or the Arrhenius relation must apply.
On the contrary, this practice is designed to provide data which can be used for such comparative purposes. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The effect of elevated temperature on any particular property is determined by selection of the appropriate test method and test specimens for that property.
Only the procedure for heat exposure is specified.
ASTM D – 18 Standard Practice for Heat Aging of Plastics Without Load
Different properties, mechanical or electrical, may not change at the same rate. Factors that affect the reproducibility of data are the degree of temperature control of the enclosure, humidity of the oven, air velocity over the specimen, and period of exposure. It is the d30445 of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
For instance, the arc resistance of thermosetting compounds improves up to the carbonization point of the material. Historical Version s – view previous versions of standard.
This standard and ISO address the same subject matter but differ in technical content. If the document is revised or amended, you will be notified by email. A plastic material is not necessarily degraded by exposure to elevated temperatures. With semi-crystalline and highly crystalline polymers, elevated temperatures may cause significant changes to the asttm of the material, invalidating or compromising that assumption.
Certain materials are susceptible to the influence of humidity. Subscription pricing is determined by: Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Proceed to Checkout Continue Shopping. You may delete a document from your Satm Profile at any time.
Add to Alert PDF. This standard and ISO address the same subject matter but differ in technical content.
Ultimate properties such as strength or elongation are more sensitive to degradation than bulk properties such as modulus, in most cases. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
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. Normally, additional shrinkage should be expected with loss of volatiles or advance in polymerization. Work Item s – proposed revisions of this standard.
Your Alert Profile lists the documents that will be monitored. Recommended procedures for determining the thermal aging characteristics of a material using a series of elevated temperatures for the purpose of estimating endurance time to a defined property change at a lower temperature are also described; the applicability of the Arrhenius relation for making predictions to other temperatures, is assumed in this case.
Please first log in with a verified email before subscribing to alerts. Caution should be exercised in using d3054 Arrhenius relation and knowledge of physical changes in the material at elevated temperatures is important. Already Subscribed to this document. The severity of the exposures in both time and temperature determines the extent and type of change that takes place. Other types of plastics become soft and sticky, either due astn sorption of volatilized plasticizer or due to breakdown of the polymer.
Arrhenius principles may only be used to accelerate a chemical mechanism e3045 there are no fundamental changes in the ast, properties. Only the procedure for heat exposure is specified. We have no amendments or corrections for this standard.
However, extended periods of exposure of plastics to elevated temperatures will generally cause some degradation, with progressive changes in physical properties. As the voice of the U. This standard is v3045 included in any packages.
Standard Practice for Heat Aging of Plastics Without Load
The property of interest is measured at room temperature. Please first verify your email before subscribing to alerts. The effect of elevated temperature on any particular property is determined by selection of the appropriate test method and test specimens for that property. Specific properties and x3045 or lifetime criteria for these properties are typically chosen for the evaluation of thermal endurance.
This standard is also available to be included in Standards Subscriptions. However, the data obtained from this practice, since it does not account for the influence of stress or environment that is involved in most real life applications, must be used cautiously by the designer, who must inevitably make material choices using additional data such as creep and creep rupture that are consistent with astk requirements of the specific application.
These transitions should be avoided both in the range of aging temperatures used, as well as in extrapolation of the lifeline.