GB/T 32675-2016 in English

《GB/T 32675-2016塑料 酚醛树脂 液体甲阶酚醛树脂在酸性条件下固化时假绝热温升的测定》由TC15（全国塑料标准化技术委员会）归口，TC15SC11（全国塑料标准化技术委员会热固性塑料分会）执行，主管部门为中国石油和化学工业联合会。

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