SN EN ISO 306-2014 pdf free.Plastics – Thermoplastic materials – Determination of Vicat softening temperature (VST) (ISO 306:2013). SN EN ISO 306 specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials: — method A50 using a force of 10 N and a heating rate of 50 K/h; — method B50 using a force of 50 N and a heating rate of 50 K/h; — method A120 using a force of 10 N and a heating rate of 120 K/h; — method 11120 using a force of 50 N and a heating rate of 120 K/h. The methods specified are applicable only to thermoplastics, for which they give a measure of the temperature at which the thermoplastics start to soften rapidly. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 291, Plastics — Standard atmospheres for conditioning and testing ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials ISO 294-1, Plastics — Injection moulding of…

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,…

ISO 1183-1-2019 pdf free.Plastics一Methods for determining the density of non-cellular plastics一Part 1:Immersion method, liquid pycnometer method and titration method. 5.1.1.2 Immersion vessel: a beaker or other wide-mouthed container of suitable size for holding the immersion liquid. 5.1.1.3 Stationary support, e.g. a pan straddle, to hold the immersion vessel above the balance pan. 5.1.1.4 Thermometer, graduated at 0.1 °C intervals, covering the range 0 °C to 30 °C. 5.1.1.5 Wire (if required), corrosion-resistant, of diameter not greater than 0,5 mm, for suspending specimens in the immersion liquid. 5.1.1.6 Sinker, of suitable mass to ensure complete immersion of the specimen, for use when the density of the specimen is less than that of the immersion liquid. 5.1.1,7 Pycnometer. with a side-arm overflow capillary, for determining the density of the immersion liquid when this liquid Is not water. The pycnometer shall be equipped with a thermometer graduated at 0.1 °C intervals from 0 °C to 30 °C. 5.1.1.8 Liquid bath, capable of being thermostatically controlled to within ±0,5 °C, for use in determining the density of the immersion liquid. 5.1.2 Immersion liquid Use freshly distilled or deionized water, or another suitable liquid, containing not more than 0,1 % of a wetting agent to…

ISO 178-2019 pdf free.Plastics一Determination of flexural properties. A test specimen of rectangular cross-section, resting on two supports, is deflected by means of a loading edge acting on the specimen midway between the supports. The test specimen is deflected in this way at a constant rate at midspan until rupture occurs at the outer surface of the specimen or until a maximum strain of 5 % (see 3) is reached, whichever occurs first. During this procedure, the force applied to the specimen and the resulting deflection of the specimen at midspan are measured. This document specifies two methods: method A and method B. Method A uses a strain rate of 1 %/min throughout the test. Method B uses two different strain rates: 1 %/min for the determination of the flexural modulus and 5 %/min or 50 %/min, depending on the ductility of the material, for the determination of the remainder of the flexural stress-strain curve. NOTE 1 The strain rates mentioned above are to be interpreted as nominal ones. Nominal test speeds are calculated using Formula (4). For the machine settings the best fitting ones are selected from Table 1. NOTE 2 For materials exhibiting nonlinear stress/strain behaviour, the flexural properties…

ISO 75-1-2020 pdf free.Plastics – Determination of temperature of deflection under load -Part 1:General test method. A standard test specimen is subjected to three-point bending under a constant load in the flatwise position to produce one of the flexural stresses given in the relevant part of ISO 75. The temperature is raised at a uniform rate, and the temperature at which the standard deflection, corresponding to the specified increase in flexural strain, occurs is measured. 5 Apparatus 5.1 Means of producing a flexural stress The apparatus shall be constructed essentially as shown in Figure 1. It consists of a rigid metal frame in which a rod shall move freely in the vertical direction. One end of the rod is fitted with a weight- carrying plate and the other end is equipped with a loading edge. The base of the frame is fitted with test-specimen supports. These supports and the vertical members of the frame are made of a material having the same coefficient of linear expansion as the rod. The test-specimen supports consist of metal pieces that are cylindrical in the contact area and with their lines of contact with the specimen in a horizontal plane. The size of the…