標準號：ISO 9396-1997
中文標準名稱：塑料 酚醛樹脂 使用自動裝置對規定條件下酚醛樹脂凝膠時間的測定
英文標準名稱：Plastics - Phenolic resins - Determination of the gel time of resols under specific conditions using automatic apparatus
標準類型：G31
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：G31
國際標準分類號：83.080.10
適用范圍：This International Standard specifies a method for determining the gel time of phenolic resins at a given temperature, using automatic apparatus under specified conditions. The test temperatures are 100 ℃, 130 ℃ and 150 ℃. The method specified employs a plunger driven to carry out a reciprocating vertical motion. This method applies to the following types of phenolic resin: - liquid resols - solid resols with low melting points Powdered resins with a short gel time, such as mixtures of novolak and hexamethylenetetramine, do not lend themselves to this type of determination. Such resins crosslink as soon as fusion starts and become too viscous in the test tube to give meaningful results. Resins containing large amounts of a solvent with a low boiling point are especially unsuitable for this type of determination. With such resins, a boiling and distillation process takes place as the resin hardens. It might be of interest to determine the time taken for the resin to gel in the presence of a catalyst. The catalyst shall be added in well defined proportions. The type of catalyst used and its treatment shall be stated in the test report.