Значение и использование
4.1 Moisture will affect the process ability of some plastics. High moisture content causes surface imperfections (that is, splay or bubbling) or degradation by hydrolysis. Low moisture (with high temperature) causes polymerization.
4.2 The physical properties of some plastics are affected by the moisture content.
1.1 Thismethod uses the reaction of Iodine (I2) with water (Karl FischerReaction) to determine the amount of moisture in a polymersample.2
1.2 Thistest method is intended to be used for the determination ofmoisture in most plastics. Plastics containing volatile componentssuch as residual monomers and plasticizers are capable of releasingcomponents that will interfere with the I2/water reaction.
1.3 Thismethod is suitable for measuring moisture over the range of 0.005to 100 %. Sample size shall be adjusted to obtain an accuratemoisture measurement.
1.4 Thevalues stated in SI units are regarded as the standard.
Note1: This standard is equivalent toISO 15512 Method B.
1.5This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety,health, and environmental practices and determine the applicabilityof regulatory limitations prior to use.
1.6This international standard was developed in accordance withinternationally recognized principles on standardizationestablished in the Decision on Principles for the Development ofInternational Standards, Guides and Recommendations issued by theWorld Trade Organization Technical Barriers to Trade (TBT)Committee.