HG/T 4458-2012 in English

本标准规定了增塑剂损失测定的两种试验方法，这两种方法包括：
--方法A：试样直接接触活性炭；
--方法B：试样放置在金属网状容器内，防止试样与活性炭直接接触。
本标准适用于定量测定活性炭存在时塑料在规定时间和温度条件下的质量损失。方法A特别适用于在较高温度下会软化流动而必须在较低温度下测试的材料。
本标准用于定量测定增塑塑料受热过程增塑剂损失时，一般假设被测塑料中不存在大量的其他挥发性物质。
本标准是经验性的试验方法，适用于快速比较不同的塑料中增塑剂（通常是挥发物）的损失。
本标准也可用于比较不同的增塑剂。在这种情况下，应采用性质清楚的树脂和已知比例的增塑剂制备标准配混料。

Scope

This standard specifies two test methods for the determination of plasticizer loss. These two methods include:
　——Method A: The sample is in direct contact with activated carbon;
　——Method B: The sample is placed in a metal mesh container to prevent the sample from Direct contact with activated carbon. This standard is applicable to the quantitative determination of the mass loss of plastics under specified time and temperature conditions in the presence of activated carbon. Method A is particularly useful for materials that soften flow at higher temperatures and must be tested at lower temperatures. When this standard is used to quantitatively determine the loss of plasticizer during the heating process of plasticized plastics, it is generally assumed that there are not a large number of other volatile substances in the plastic being tested. This standard is an empirical test method suitable for quickly comparing the loss of plasticizers (usually volatiles) in different plastics. This standard can also be used to compare different plasticizers. In this case, a standard compound should be prepared using a well-characterized resin and a known proportion of plasticizer.