Gummi

This document specifies an instrumental (automatic analyser) method for the determination of total sulfur in rubber and rubber products.

This document specifies a quantitative test method to determine the 2-Mercaptobenzothiazole content in rubber and rubber products by high performance liquid chromatography (HPLC).

This document describes a procedure for the determination of the following antidegradants in vulcanized rubbers:

— aminoketone group, ex: TMQ, ETMDQ, EDTMQ, ETMQ, ETMDQ;

— naphthylamine group, ex: PAN, PANA;

— diphenylamine group, ex: ODPA, SDPA, CD4, DCD;

— p-phenylenediamine, ex: IPPD, 6PPD, 7PPD, DNPD, BMPPD, 77PD, DOPD, 88PD, OPPD, 8PPD, CPPD, DMHPD;

— monophenol group, ex: SPH, SP, BHT, DTBMP2, DTBMOP2, DMTBP2;

Extender oils, when present, can interfere.

NOTE For poly-2,2,4-trimethyl-1,2-dihydroquinoline, the method will provide only an approximation because of its polymeric nature.

This document specifies a method for determining the glass transition temperature, Tg, of vulcanized rubbers in the hardness range from 30 IRHD to 80 IRHD. The dynamic properties are measured via temperature sweep in sinusoidal deformation at a defined strain and frequency and Tg is determined from the peak in the tan δ versus temperature curve. Glass transition temperature, Tg, determined in this way serves the purpose of a guideline to the service temperature of the material.

This document specifies a static procedure, known as the Gehman test, for determining the relative stiffness characteristics of vulcanized or thermoplastic rubbers over a temperature range from room temperature to approximately −150 °C.

This document specifies a method for determining the pre-vulcanization characteristics of compounded rubber.

The pre-vulcanization characteristics determined by this method provide a means of estimating how long compounded rubber can be maintained at high temperatures and remain processable.

This document specifies a method of test for measuring the force required to separate, by stripping, two plies of fabric bonded with rubber, or a rubber layer and a fabric ply bonded together.

The method is applicable when the ply surfaces are approximately plane or when they are in the form of a cylinder having an internal diameter greater than approximately 50 mm. The method is not applicable when the ply surfaces contain sharp bends, angles or other gross irregularities which cannot be excluded when cutting out test pieces.

This document does not apply to coated fabrics, which are tested in accordance with ISO 2411, or textile conveyor belts, which are tested in accordance with ISO 252.