GB/T 3400-2002 Plastics--Hompopolymer and copolymer resins of vinyl chloride for general use--Determination of plasticizer absorption at room temperature
This standard specifies a method for determining plasticizer absorption at room temperature.
This standard is applicable to filler resins and homopolymer and copolymer resins of vinyl chloride for general use.
2 Normative references
The following standards contain provision which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited are valid. All standards are subject to revision, and all parties using this standard are encouraged to investigate the possibility of applying the latest editions of the following standards.
GB/T 11406-2001 Di-(2-ethylhexyl) phthalate for industrial use
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 Analytical balance: capable of weighing to 0.1 mg.
4.2 Burette.
4.3 Centrifuge: whose rotor turns in a horizontal plane and which has an acceleration under the test conditions of 11,000 m/s2~13,000 m/s2 measured at the bottoms of the tubes, with, if necessary, the temperature of the mixture being prevented from exceeding 30 °C during the centrifuge test.
