Ethylene-vinyl acetate copolymer abbreviation

As a result of the different properties of the material, the mbbery copolymers are indicated here as EVM according to the mbber nomenclature, with the M standing for the saturated backbone. We prefer the abbreviation EVM instead of EAM, as prescribed in ASTM D 1418-85, to avoid confusion with ethylene-acrylate copolymers, coded as AEM. The thermoplastic material is denoted by EVA, but this abbreviation is also frequently used for the whole class of ethylene vinyl acetate copolymers. 

ISO and DIN Codes for Data Block 1 Data block I of the individual item block contains the abbreviation of the chemical name of the material, e.g., PA 12 (see example). This abbreviation may be followed by analytical data with respect to the composition of the material an example is the content of vinyl acetate units in ethylene-vinyl acetate copolymers. Such chemical structure data may be composition, such as content of vinyl acetate (VAC) or acrylonitrile units (AN), configuration as measured by isotacticity ( isotaxy ) (IT), branching as revealed by density (D). 

VAM is used to produce a homopolymer and, together with a wide array of different monomers, a number of copolymers. Copolymers with ethylene are one of the most important classes of copolymers known and, depending on the ratio of ethylene and vinyl acetate, are abbreviated as EVA (high ethylene and low vinyl acetate content) or VAE (high vinyl acetate and low ethylene content) [18] polymers. 

Ethylene]vinyl acetate. Symbolized as E/VAC according to ISO 1043 but the abbreviation of EVA is extensively used in the literature. Copolymer of ethylene and vinyl acetate. Its flexibility is similar to that of the plasticized PVC but in this case it is an inherent property due to the chemical structure without any incorporation of a plasticizer. As a thermoplastic, it is processed by extrusion or injection moulding. Strainability of E/VAC films is higher than that of LDPE. Applications injection moulded shoe soles, bathing sandals, and other consumer goods impact modifier for rigid PVC. Trade names Levapren (FRG), Ultrathene (USA). 

Polyethylene-co-vinyl alcohol resins are produced indirectly by the hydrolysis (saponification) of ethylene-co-vinyl acetate copolymers. The structure of the vinyl alcohol branch is shown in Figure 9. Hydrolysis can be achieved by the action of alcoholic sodium hydroxide or potassium hydroxide in an organic solvent solution at high temperature [84,86]. Ethylene-co-vinyl alcohol copolymers are often referred to as EVAL (pronounced as a single word) or by the abbreviation EVOH. Like their ethylene-co-vinyl acetate precursors, ethylene-co-vinyl alcohol copolymers also contain short- and long-chain branching. 

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