ISO 17744:2004 塑料.作为温度和压力函数的比容的测定（pvT图）.活塞装置法

标准编号：ISO 17744:2004

中文名称：塑料.作为温度和压力函数的比容的测定（pvT图）.活塞装置法

英文名称：Plastics — Determination of specific volume as a function of temperature and pressure (pvT diagram) — Piston apparatus method

发布日期：2004-11

标准范围

ISO 17744:2004描述了在熔融和固态下测定塑料的比体积作为温度和压力的函数的程序。该标准规定了配备活塞的设备的使用，其中保持在测量单元中的测试样品通过活塞加压。可以在恒定压力或恒定温度的条件下进行测量。在恒压模式下，允许的最大加热和冷却速率限制为5℃/分钟。通过使用这些程序，可以获得:表示给定材料的压力、比体积和温度之间存在的关系的pvT图；可压缩性和体积热膨胀系数；作为温度和压力函数的一级和玻璃化转变信息。

ISO 17744:2004 describes procedures for determining the specific volume of plastics as a function of temperature and pressure in both the molten and solid states.The standard specifies the use of a piston-equipped apparatus in which the test sample, held in a measurement cell, is pressurized by means of the piston. Measurements under conditions of constant pressure or constant temperature can be made. In the constant-pressure mode, the maximum heating and cooling rates permissible are restricted to 5 °C/min.By using these procedures, it is possible to obtain:

• pvT diagrams that represent the relationship which exists between pressure, specific volume and temperature for a given material;
• compressibility and volumetric thermal-expansion coefficients;
• information on first-order and glass transitions as a function of temperature and pressure.

标准预览图