DIN 51604-3-1984 Methanolic lower layer FAM testing fluid for polymer materials composition and requirements《聚合材料用下层甲醇FAM检验液 成分和要求》.pdf
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1、UDC 665.733 :662.753 : O01 A : 620.193.471.2 : 678.7 : 614.8 DEUTSCHE NORM Methanolic lower layer FAM testing fluid for polymer materials Composition and requirements March 1984 DIN 51 604 Part 3 FAM-Prfflssigkeit, methanol hakige Unterphase, fr Polymerwerkstoffe; Zusammensetzung und Anforderungen I
2、n keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. 1 Methanolic lower layer FAM testing fluid), 2) is used, unless decrees or relevant technical rules specify otherwise, for testi
3、ng polymer materials, e.g. elastomer materials, plastics components and coatings used in the motor car industry and in the petroleum distribution system which come into close contact with a lower phase which may be formed from mixed fuels containing alcohol when water is added. Examples of mixed fue
4、ls containing alcohol are those types of petrol consisting mainly of hydrocarbons which contain either more than 3% by volume of methanol or more than 5% byvolume of ethanol or, if both are mixed, more than 2% of methanol, with the total of the two percentages by volume exceeding 4%. When testing wi
5、th the methanolic lower layer FAM testing fluid, the swelling and extraction effect (change in mass and volume), the change in hardness, expansion and strength properties as specified in the relevant standards, e.g. DIN 53 476 and DIN 53 521, can be determined. Note. Under certain conditions, e.g. u
6、nder the influence of moisture and/or storage at low temperatures, methanolic fuel tends to separate forming a lower layer containing enriched methanol. The meth- anol content found in practice in the lower layer depends not only on the temperature and mois- ture content, but also, for example, on t
7、he inter- val between separation and establishment of equilibrium between the layers. This standard, which pays particular attention to the effect of moisture during the seperation stage, specifies a testing fluid, the methanol content of which cor- responds to average values obtained in practice. M
8、ethanolic lower layer FAM testing fluid did not correspond to any commercially available petrol at the time this standard was prepared, nor is it expected to correspond to such petrol in the future. On the basis of DIN 51 604 Part 1 and Part 2, it may be regarded as a testing fluid for assessing the
9、 behaviour of polymer materials with Scope and field of application regard to swelling and extraction effects and change in hardness, expansion and strength prop- erties when in contact with a lower layer formed from methanolic fuel if the latter contains the above-mentioned percentages of alcohol.
10、In order to ensure the homogeneity of the meth- anolic lower layer FAM testing fluid, the test teyperature should be above OC and not exceed 40 C as long as the test is carried out at ambient pressure. 2 Concept Methanolic lower layer FAM testing fluid is a mixture produced for testing purposes the
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