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 Standard Practice for Heat Aging of Plastics Without Load – ASTM D Status: Withdrawn · Replaced by: ASTM D Buy this standard.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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Normally, additional shrinkage should be expected with loss of volatiles or advance in polymerization.
Subscription pricing satm determined by: You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Please first verify your email before subscribing to alerts. 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. Arrhenius principles may only be used to accelerate a chemical mechanism if there are no fundamental changes in the material properties.
Standard Practice for Heat Aging of Plastics Without Load
Already Subscribed to this document. The property of interest is measured at room temperature. For instance, the arc resistance of thermosetting compounds improves up to the carbonization point of the material. Other types of plastics become soft and sticky, either due to sorption of volatilized plasticizer or due to breakdown of the polymer.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. You may delete a document from your Alert Profile at any zstm. However, extended periods of exposure of plastics to elevated temperatures will generally cause some degradation, with progressive changes in physical properties. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
Work Item s – proposed revisions of this standard. Certain materials are susceptible to the influence of humidity.
This standard is not included in any packages. Different properties, mechanical or electrical, may not change at the same rate. If the document is revised or amended, you will be notified by email.
Standards Subsctiption may be the perfect solution. The effect of elevated temperature on any particular property is determined by selection of the appropriate astk method and test specimens for that property.
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 wstm predictions to other temperatures, is assumed in this case.
Specific properties and failure or lifetime criteria for these satm are typically chosen for the evaluation of thermal endurance. On the contrary, this practice is designed to provide data which can be used for such comparative purposes.
ASTM D – 18 Standard Practice for Heat Aging of Plastics Without Load
We have no amendments or corrections for this standard. Need more than one copy? The property of interest is measured at room temperature. Ultimate properties such as strength or elongation are more sensitive to degradation than bulk properties such as modulus, in most cases. Link to Active This link will always route to the current Active version of the standard.
This standard is also d30045 to be included in Standards Subscriptions. Only the procedure for heat exposure is specified. Historical Version s – view previous versions of standard. 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.
The severity of the exposures in both time and temperature determines the extent and type of change that takes place. Only the procedure for heat exposure is specified. C3045 should be exercised in using the Arrhenius relation and knowledge of physical changes in the material at elevated temperatures is important. This standard and ISO address the same subject matter but differ in technical content.