ISO 2476:1996 pdf download.Rubber, butadiene (BR) - Solution-polymerized types - Evaluation
procedures
1 Scope
ISO 2476:1996 pdf download specifies
— physical and chemical tests on raw rubbers;
— standard materials, standard test formulations, equipment and processing methods for evaluating the vulcanization characteristics of solutionpolymerized butadiene rubbers (BR), including oil- extended types (OEBR). and the tensile stress- strain properties of vulcanized mixes.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this Internation& Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 37:1994, Rubber, vulcanized vi tlieiiiivpleislic — Determination of tensile stress-strain properties.
ISO 247:1990, Rubber — Determination of ash.
ISO 248:1991, Rubbers, raw — Determination of volatile-matter content.
ISO 289-1:1994， Rubber, unvulcanized - Determi-nations using a shearing-disc viscometer 一Part 1.Determination of Mooney viscosity.
ISO 471:1995， Rubber - Temperatures, humidities and times for conditioning and testing.
ISO 1795:1992, Rubber, raw, natural and synthetic - Sampling and further preparative procedures
ISO 2393:1994， Rubber test mixes一Preparation,mixing and vulcanization - - Equipment and pro-
cedures.
ISO 3417:1991. Rubber一Measurement of vulcan- ization characteristics with the oscillating disc cure- meter.
ISO 6502:1991, Rubber - Measurement of vulcan- ization characteristics with rotorless curemeters
ISO/TR 9272:1986， Rubber and rubber products 一Determination of precision for test method standards.
Only method C1 of this International Standard (mill mixing) was used for preparing the mixes.
The mixes were prepared from special samples of all the necessary materials, sent to each laboratory prior to the actual testing. For each material, the samples were drawn from a uniform and homogeneous lot.Stress-strain tests were conducted on cured sheets of each of the mixes or compounds as specified by the test programme
9.2.2 Determinations of modulus (stress at 300 %),tensile strength and percent elongation were made,taking as the result the median of five individual de-terminations, as specified in ISO 37. All 17 labora-tories performed the test using dumb-bell test pieces Five of the laboratories also performed the test using ring test pieces. The precision thus evaluated is a type 2 precision, and the time period for repeatability and reproducibility is on a scale of days ISO 2476 pdf download.