【国外标准】 Standard Test Method for Interior Porosity of Poly(Vinyl Chloride) (PVC) Resins by Mercury Intrusion Porosimetry (Withdrawn 2003)

1.1 This test method describes a procedure for measuring the interior pore volume and the apparent pore diameter distribution of porous poly(vinyl chloride) resins. The measurements are made by forcing mercury under increasing pressure through a graduated penetrometer into the open pores of the resin samples. The volume of mercury forced into the pores is defined from the change of the mercury volume in the penetrometer; the apparent pore diameter distribution can be defined from incremental volume changes with increasing pressure. 1.2 Warning-This standard includes the use of an OSHA-designated hazardous chemical (Mercury). For specific hazard information and guidance relative to use, consult the health and safety documents provided by the supplier, for example, the material safety data sheet. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Note 1-There are no ISO standards covering the primary subject matter of this test method.