1、Designation:D 5512 96An American National StandardStandard Practice forExposing Plastics to a Simulated Compost EnvironmentUsing an Externally Heated Reactor1This standard is issued under the fixed designation D 5512;the number immediately following the designation indicates the year oforiginal adop
2、tion or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the exposure of plastics to a specifictest environment.Th
3、e test environment is an externally heatedlaboratory-scale reactor that simulates a composting system.Plastic exposure occurs in the presence of a media undergoingaerobic composting.The standard media simulates a municipalsolid waste from which inert materials have been removed.This practice allows
4、for the use of other media to representparticular waste streams.This practice provides exposed speci-mens for further testing and for comparison with controls.Thistest environment does not necessarily reproduce conditions thatcould occur in a particular full-scale composting process.1.2 Changes in t
5、he material properties of the plastic andcontrols should be determined using appropriate ASTM testprocedures.Changes could encompass physical and chemicalchanges such as disintegration and degradation.1.3 This practice may be used for different purposes.There-fore,the interested parties must select:
6、exposure conditionsfrom those allowed by this practice;criteria for a validexposure,that is,minimum or maximum change requirementsfor the compost and controls;and the magnitudes of materialproperties changes required for the plastic specimens.1.4 The values stated in SI units are to be regarded as t
7、hestandard.The values given in parentheses are for informationonly.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the appli
8、ca-bility of regulatory limitations prior to use.Specific hazardstatements are given in Section 8.NOTE1There is no similar or equivalent ISO standard.2.Referenced Documents2.1 ASTM Standards:D 618 Practice for Conditioning Plastics and ElectricalInsulating Materials for Testing2D 638 Test Method for
9、 Tensile Properties of Plastics2D 882 Test Methods for Tensile Properties of Thin PlasticSheeting2D 883 Terminology Relating to Plastics2D 1898 Practice for Sampling of Plastics2D 1922 Test Method for Propagation Tear Resistance ofPlastic Film and Thin Sheeting by Pendulum Method2D 3593 Test Method
10、for Molecular Weight Averages Distri-bution of Certain Polymers by Liquid Size-ExclusionChromatography(Gel Permeation Chromatography(GPC)Using Universal Calibration3D 3826 Practice for Determining Degradation End Point inDegradable Polyolefins Using a Tensile Test42.2American Public Health Associati
11、on Standard:5210 B.5-Day BOD Test,Standard Methods for the Exami-nation of Water and Wastewater53.Terminology3.1 DefinitionsDefinitions of terms applying to this prac-tice appear in Terminology D 883.Definitions in TerminologyD 883 supersede definitions in this section.3.2 Definitions of Terms Speci
12、fic to This Standard:3.2.1 aerobica life process that occurs in the presence ofoxygen(1).63.2.2 biological reactora vessel in which living organ-isms,usually microorganisms,catalyze a reaction.3.2.3 composta relatively stabilized and sanitized productof composting.3.2.4 compost environmenta biologic
13、al reactor containinga solid-organic-waste matrix in which aerobic degradationoccurs due to the action of microorganisms and other mecha-nisms.3.2.5 degradationthe process by which a chemical isreduced to a less complex form(1).3.2.6 disintegrationphysical breakup of a solid material.3.2.7 inoculumm
14、icroorganisms placed in compost to startor accelerate biological action(1).1This practice is under the jurisdiction of ASTM Committee D-20 on Plasticsand is the direct responsibility of Subcommittee D20.96 on EnvironmentallyDegradable Plastics.Current edition approved June 10,1996.Published August 1
15、996.Originallypublished as D 5512 94.Last previous edition D 5512 94.2Annual Book of ASTM Standards,Vol 08.01.3DiscontinuedSee 1992 Annual Book of ASTM Standards,Vol 08.02.4Annual Book of ASTM Standards,Vol 08.02.5Standard Methods for the Examination of Water and Wastewater,18th ed,1992,published by
16、 the American Public Health Assn.,1015 Fifteenth St.,NW,Washington,DC 20005.6The boldface numbers in parentheses refer to the list of references at the end ofthis standard.1AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTMNOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.3.2.8 simulated
