Plastics - Phenolic resins -
Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions
1 Scope
This standard specifies a method for determining the exothermic reactivity of thermo-setting liquid phenolic resins when mixed with an acid hardener under specified conditions. The results of the determination are used as a means of assessing the behaviour of the resin during processing.
2 Principle
A phenolic resin is mixed with an acid hardener and allowed to harden. The highest temperature reached is measured, as well as the time taken to reach this temperature.
3 Reagent
3.1 Suitable acid hardener
Depending on the composition of the resin, e.g. p-phenol sulfonic acid, technical grade, 65%±1% (mass fraction) in water.
4 Apparatus (see Figure 1)
Foreword i
1 Scope
2 Principle
3 Reagent
4 Apparatus (see Figure 1)
5 Procedure
6 Expression of results
7 Precision (test error)
8 Test report