介绍
ISO标准 (国际标准化组织) 是国家标准机构的全球联盟 (ISO 成员机构). 国际标准的制定通常通过ISO技术委员会进行. 每个对已设立技术委员会的主题感兴趣的成员机构都有权派代表参加该委员会. 与 ISO 联络的国际政府和非政府组织也参与了这项工作. ISO 与国际电工委员会密切合作 (恒温恒湿试验箱) 关于电气标准化的所有问题.
技术委员会通过的国际标准草案将分发给各成员机构进行投票. 作为国际标准发布需要至少 75% 成员机构数量.
国际标准ISO 9396 由ISO/TC技术委员会制定 61, 塑料, SC小组委员会 12, Thermosetting Materials.
第二版取消并取代了第一版 (ISO标准 9396:1989), where method A (using a rotary stirrer) was removed and a precision clause was added.
步 1: 范围
This standard specifies a method for determining the gel time of phenolic resins under specified conditions at a given temperature using an automatic device. The test temperatures were 100°C, 130°C and 150°C.
The specified method uses a plunger drive to perform reciprocating vertical motion.
The method is suitable for the following types of phenolic resins:
– Liquid sol
ISO标准 9396-1997 “Determination of the gel time of plastic phenolic resins using automated equipment under specific conditions”
– Low melting point solid dissolver
Powdered resins with short gel times, such as a mixture of phenolic varnish and hexamethylenetetramine, are not suitable for this type of determination. This resin cross-links once fusion begins and becomes too sticky in a test tube to give meaningful results. Resins containing large amounts of low boiling point solvents are particularly unsuitable for this type of determination. For this resin, a boiling and distillation process occurs as the resin hardens.
It may be interesting to determine how long it takes for the resin to gel in the presence of a catalyst. The catalyst shall be added in clearly specified proportions. The type of catalyst used and its treatment shall be described in the test report.
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