EOM—Copolymers of ethylene and an octene. N—Rubbers having nitrogen, but not oxygen or phosphorus, EPDM—Terpolymer of ethylene, propylene, and a diene in the polymer chain. Current edition approved May 10, Published Julyl
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A number in parentheses indicates the year of last reapproval. A superscript epsilon? This standard has been approved for use by agencies of the Department of Defense. The system was designed to be a generic classi? The chemical composition of the polymer chain was selected as the best classi? The rubber polymers were divided into eight classes as described in Section 3 of this practice.
The letter symbol for the class was given last in the designation for the rubber. Preceding the class symbol were letter symbols to designate either the monomers used to prepare the polymer or the substituent groups on the polymer chain. The system has been successful both in accommodating the many new polymers developed since and in conveying to the user certain characteristics of the rubber associated with the chemical composition.
Scope 1. The symbols can follow the chemical name for use in later references. Terminology and Abbreviations 3. Rubbers 3. N—Rubbers having nitrogen, but not oxygen or phosphorus, in the polymer chain.
O—Rubbers having oxygen in the polymer chain. R—Rubbers having an unsaturated carbon chain, for example, natural rubber and synthetic rubbers derived at least partly from diole? Q—Rubbers having silicon and oxygen in the polymer chain. T—Rubbers having sulfur in the polymer chain.
U—Rubbers having carbon, oxygen, and nitrogen in the polymer chain. Z—Rubbers having phosphorus and nitrogen in the polymer chain. Class Designations 4. The following classi? Referenced Documents 2. Current edition approved Oct. Published November Originally approved in Last previous edition approved in as D — DOI: AEM—Copolymers of ethyl or other acrylates and ethylene. ANM—Copolymers of ethyl or other acrylate and acrylonitrile.
EOM—Copolymers of ethylene and an octene. EPDM—Terpolymer of ethylene, propylene, and a diene with the residual unsaturated portion of the diene in the side chain. EPM—Copolymers of ethylene and propylene. EVM—Copolymers of ethylene and vinyl acetate. FKM—Fluoro rubber of the polymethylene type that utilizes vinylidene? Type 1—Dipolymer of hexa? Type 2—Terpolymer of tetra? Type 3—Terpolymer of tetra? Type 4—Terpolymer of tetra? Type 5—Pentapolymer of tetra? IM—Polyisobutylene not curable.
ECO—Ethylene oxide oxirane and chloromethyl oxirane epichlorohydrin copolymer. GECO—Epichlorohydrin-ethylene oxide-allylglycidylether terpolymer. GPO—Polypropylene oxide and allyl glycidyl ether. The letter immediately preceding the letter R shall signify the diole? Any letter or letters preceding this diole? The M preceding the Q indicates that methyl is one of the substituent groups on the polymer chain. FMQ—Silicone rubber having both methyl and?
FVMQ—Silicone rubber having? PMQ—Silicone rubbers having both methyl and phenyl substituent groups on the polymer chain. PVMQ—Silicone rubbers having methyl, phenyl, and vinyl substituent groups on the polymer chain. MQ—Silicone rubbers having only methyl substituent groups on the polymer chain, such as dimethyl polysiloxane.
VMQ—Silicone rubber having both methyl and vinyl substituent groups on the polymer chain. AU—Polyester urethane. EU—Polyether urethane. ENR—Epoxidized natural rubber. ENR-G—Epoxidized guayule natural rubber. HNBR—Hydrogenated acrylonitrile-butadiene. IR—Isoprene, synthetic. NR—Natural rubber. NR-G—Guayule natural rubber. SIR—Styrene-isoprene rubbers.
PZ—A rubber having a -P CxN- chain and having aryloxy phenoxy and substituted phenoxy groups attached to the phosphorus atoms in the chain. If the composition is known, the major component shall be listed? Keywords 5. This appendix will serve as a historical reference. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. The system was designed to be a genericclassification of the rubber polymers that would accommodate both existing and future rubbers.
Designating Rubber Polymers with ASTM D1418