标准号：ISO 75-2-2004
实施状态：作废
中文名称：塑料.载荷下挠曲温度的测定.第2部分:塑料和硬橡胶
英文名称：Plastics - Determination of temperature of deflection under load - Part 2: Plastics and ebonite
发布日期：2004-05-01
被替代标准：ISO 75-2-2013
代替标准：ISO 75-2-1993;ISO/FDIS 75-2-2003
采用标准：DIN EN ISO 75-2-2004,IDT;DIN EN ISO 75-2-2001,IDT;BS EN ISO 75-2-2004,IDT;GB/T 1634.2-2004,IDT;EN ISO 75-2-2004,IDT;NF T51-005-2-2005,IDT;JIS K 7191-2-2007,IDT;SN EN ISO 75-2-2004,IDT;SN EN ISO 75-2/AC-2006,IDT;OENORM EN ISO 75-2-2004,IDT;OENORM EN ISO 75-2-2006,IDT;PN-EN ISO 75-2-2004,IDT;PN-EN ISO 75-2-2006,IDT;UNE-EN ISO 75-2-2005,IDT
起草单位：ISO/TC 61
标准简介：This part of ISO 75 specifies three methods, using different values of constant flexural stress, that can be used for the determination of the temperature of deflection under load of plastics (including filled plastics and fibre-reinforced plastics in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite:
— method A, using a flexural stress of 1,80 MPa;
— method B, using a flexural stress of 0,45 MPa;
— method C, using a flexural stress of 8,00 MPa.
The standard deflection As used to determine the temperature of deflection under load corresponds to a flexural-strain increase Aq defined in this part of ISO 75. The initial flexural strain due to the loading of the specimen at room temperature is neither specified nor measured in this part of ISO 75. The ratio of this flexural-strain difference to the initial flexural strain depends on the modulus of elasticity, at room temperature, of the material under test. This method is therefore only suitable for comparing the temperatures of deflection of materials with similar room-temperature elastic properties.
NOTE The methods give better reproducibility with amorphous plastics than with semi-crystalline ones. With some materials, it may be necessary to anneal the test specimens to obtain reliable results. Annealing procedures, if used, generally result in an increase in the temperature of deflection under load (see 6.6).
For additional information, see ISO 75-1:2004, clause 1.
文件格式：PDF
文件大小：178.44KB
文件页数：18
（以上信息更新时间为：2019-11-22）
ISO 75-2-2004 塑料.载荷下挠曲温度的测定.第2部分_塑料和硬橡胶.pdf
(178.44 KB)
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