ISO 22007-2-2015 pdf free.Plastics – Determination of thermal conductivity and thermal diffusivity – Part 2: Transient plane heat source (hot disc) method.
This part of Iso 22007 specifies a method for the determination of the thermal conductivity and thermal diffusivity, and hence the specific heat capacity per unit volume of plastics. The experimental arrangement can be designed to match different specimen sizes. Measurements can he made in gaseous and vacuum environments aLa range of temperatures and pressures.
This method is suitable for testing homogeneous and isotropic materials, as well as anisotropic materials with a uniaxial structure. The homogeneity of the material extends throughout the specimen and no thermal barriers (except those next to the probe) are present within a range defined by the probing depth(s) (see 3 below).
The method Is suitable for materials having values of thermal conductivity, A, in the approximate range 0,010 Wm-lK-1 < A < 500 W-m-1K-l, values of thermal diffusivity, a, in the range 5 x 10-H m2s’ <a < 10-4 m2•s-1, and for temperatures, 7’, in the approximate range 50 K < T< 1 000 K.
NOTE 1 The specific heat capacity per unit volume, C, can be obtained by dividing the thermal conductivity, A, by the thermal diffusivity, a, i.e. C = A/a, and is in the approximate range 0.005 MJm-3K’ <Cc 5 MJm-3•K-1. It is also referred to as the volumetric heat capacity.
NOTE 2 If the intention is to determine the thermal resistance or the apparent thermal conductivity in the through-thickness direction of an inhomogeneous product (for Instance a fabricated panel) or an inhomogeneous slab of a material, reference is made to ISO 8301. ISO 8302, and ISO 472.
The thermal-transport properties of liquids can also be determined, provided care is taken to minimize thermal convection.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the cited edition applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 22007-1, Plastics — Determination of thermal conductivity and thermal diffusivity — Part 1: General principles
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 22007-1 and the following apply.ISO 22007-2 pdf download.
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