ISO 4608 pdf download

ISO 4608 pdf download.Plastics — Homopolymer and copolymer resins of vinyl chloride for general use — Determination of plasticizer absorption at room temperature 1 Scope This International Standard specifies a method for determining plasticizer absorption at room temperature. It is applicable to PVC general-purpose resins and filler resins (designated “G” and “F” in ISO 1 060-1 :1 998, Plastics — Homopolymer and copolymer resins of vinyl chloride — Part 1 : Designation system and basis for specifications ). The object of the test is to determine the quantity of plasticizer absorbed by a resin at room temperature to give a dry mixture. The results give a general indication of the plasticizer absorption of a resin at room temperature. They indicate the usefulness of resins for the manufacture of plasticized dry blends, particularly when taken in conjunction with the results of plasticizer absorption tests under hot conditions. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1 385-1 :1 977, Phthalate esters for industrial use — Methods of test — Part 1 : General. 3 Principle An excess of bis-(2-ethylhexyl) phthalate (DOP) is added to a specified amount of resin. The mixture is then centrifuged under defined conditions and the amount of plasticizer retained by the resin determined. 4 Apparatus and materials Ordinary laboratory apparatus, plus the following: 4.1 Balance, capable of weighing to 0,1 mg. 4.2 Burette, for example 50 cm 3 , graduated at 0,1 cm 3 intervals. 4.3 Centrifuge, whose rotor turns in a horizontal plane and which has an acceleration under the test conditions of 24 500 m⋅s –2 to 29 500 m⋅s –2 measured at the bottoms of the tubes, with, if necessary, a cooling system to prevent the temperature of the mixture from exceeding 30 °C at the end of centrifuging for 60 min. NOTE — It is permissible to use different centrifuging conditions, i.e. a different acceleration, a different time and smaller centrifuge tubes (see 4.4), provided that it has been verified that the results obtained are equivalent....