ASTM D 2842-06 Standard Test Method for Water Absorption of Rigid Cellular Plastics

American Society for Testing and Materials (ASTM). Current edition approved Nov. 1, 2006. Published November 2006. 10 p. This test method covers the determination of the water absorption of rigid cellular plastics by measuring the change in buoyant force resulting from immersion under a 5.1 cm (2-in.) head of water for the specified immersion period of 96 h.
This test method describes two procedures that shall be used to measure the change in buoyant force. ProcedureAshall be used for materials that either experience rapid water absorption or that show an increase in volume during the exposure period, or both. Materials that do not exhibit either of these characteristics shall be evaluated by Procedure B.