ISO-8989-1995.pdf
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1、INTERNATIONAL STANDARD IS0 8989 Second edition 1995-l 2-15 Plastics - Liquid phenolic resins - Determination of water miscibility Plastiques - R m is the mass, in grams, of the test portion. NOTE 2 It is also possible to express the results as the ratio By means of the burette (5.41, add grade 3 wat
2、er, also preconditioned at 23 “C IL 0,l OC, in accordance with the following procedure: 1 n where x = WMIIOO - the first addition shall be approximately 50 % of the quantity expected to be required to reach the miscibility limit (i.e. approximately 50 % of that determined in the preliminary test if
3、the miscibility was unknown); - subsequent additions shall be approximately 10 % of the quantity expected to be required, until turbidity occurs and vanishes again upon stirring; - verify with the thermometer that the temperature of the mixture is 23 “C + 0,l C, then resume the addition of water dro
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