GSO ISO 75-2:2015由GSO 发布于 2015-09-03。
GSO ISO 75-2:2015在国际标准分类中归属于: 83.080.10 热固性塑料。
GSO ISO 75-2:2015 塑料 负载变形温度的测定 第2部分:塑料和硬橡胶的最新版本是哪一版?
最新版本是 GSO ISO 75-2:2015 。
This part of ISO 75 specifies three methods, using different values of constant flexural stress, which 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, Δs, used to determine the temperature of deflection under load corresponds to a flexural-strain increase, Δεf, 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 increase 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 1 The methods give better reproducibility with amorphous plastics than with semi-crystalline ones. With some materials, it can 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). NOTE 2 For additional information, see ISO 75-1:2013, Clause 1.
其主要用于热塑性塑料、硬橡胶和长纤维增强复合材料等有关材料的热变形温度(HDT)和维卡软化温度(VST)的测定,广泛应用于塑料原料生产、塑料制品、石油化工等行业以及有关大专院校、科研部门和商检部门。2测定仪测定出这两种温度的原理是什么?...
维卡软化点测定仪器为 热变形维卡温度测定仪,是根据GB/T1633《热塑性塑料软化温度(VST)的测定》、GB/T1634《塑料弯曲负载热变形温度试验方法》、GB8802《硬聚氯乙烯(PVC-U) 管材及管件维卡软化温度测定方法》以及 ISO75 、ISO306 、ISO2507 、ASTM1525 ASTM D648标准的要求设计制造的,广泛用于热塑性塑料、硬橡胶和长纤维增强复合材料等热变形温度...
为热变形维卡温度测定仪,是根据GB/T1633《热塑性塑料软化温度(VST)的测定》、GB/T1634《塑料弯曲负载热变形温度试验方法》、GB8802《硬聚氯乙烯(PVC-U) 管材及管件维卡软化温度测定方法》以及 ISO75 、ISO306 、ISO2507 、ASTM1525 ASTM D648标准的要求设计制造的,广泛用于热塑性塑料、硬橡胶和长纤维增强复合材料等热变形温度(HDT)和维卡温度...
热变形维卡软化点温度测定仪,主要用于塑料、硬橡胶、尼龙、电绝缘材料、长纤维增强复合材料、高强度热固性层压材料等非金属材料的热变形温度及维卡软化点温度的测定。操作方便、控制,智能化极高。 热变形维卡用智能控制器控制温度,控温效果理想;热变形维卡测变形采用光栅式高精度百分表,使测量值更稳定。...
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