Test Methods for Water Absorption of Rigid Cellular Plastics

ASTM D 2842 Test Methods for Water Absorption of Rigid Cellular Plastics [Pg.402]

The ASTM procedure covers the determination of the water absorption of cellular plastics (lighter than water) by measuring the change in buoyant force resulting from immersion. It can be applicable to WPC, having density less than 1.0, in its methodological part of underwater weighing of specimens. [Pg.402]

4-day submerging period. Water absorption (%) by the specimen volume is calculated and reported, along with water absorbed per unit of surface area, apparent specimen volume, surface area, true specimen volume, and volume of surface cells. [Pg.402]

The ASTM method describes as an example polyisocyanurate (Procedure A) and extruded polystyrene (Procedure B), both samples 3 in. thick, in terms of the average water absorption as volume percent. For polyisocyanurate it is 2.06 0.14% (within-laboratory tests) and 2.1 + 0.5% (between-laboratory tests). For extruded polystyrene it is 0.17 0.04% (within laboratory tests) and 0.17 0.08% (between-laboratory tests). [Pg.402]

ASTM D 6662 Standard Specification for Polyolefin-Based Plastic Lumber Decking Boards [Pg.402]

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