Standard No.:	GB/T 32675-2016
English Name:	Plastics—Phenolic resins一Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions
Chinese Name:	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
Chinese Classification:	G31    Basic standards and general methods for synthetic resin and plastic
Professional Classification:	GB    National Standard
ICS Classification:	83.080.10 83.080.10    Thermosetting materials 83.080.10
Issued by:	AQSIQ; SAC
Issued on:	2016-06-14
Implemented on:	2017-1-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	3500 words
Price(USD):	100.0
Delivery:	via email in 1 business day

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