GB/T 24131-2009 (English Version) PDF

Standard No.: GB/T 24131-2009
Language: Chinese, Available in English version
Release Date: 2009
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2019-04
Replace By: GB/T 24131.1-2018
Latest: GB/T 24131.1-2018

Scope: This standard specifies two methods for the determination of moisture and other volatile substances in raw rubber: hot roll method and oven method. This standard is applicable to the determination of the volatile content of the "R" group rubber listed in GB/T 5576-1997. "R" group rubber refers to rubbers containing unsaturated carbon chains, such as natural rubber and synthetic rubber at least partially polymerized from dienes. This standard may also be applicable to the determination of other types of rubber. In this case, it should be verified that the change in mass is due only to the loss of the original volatile species and not to degradation of the rubber. The hot roll method is not suitable for natural rubber and synthetic isoprene rubber or rubber that is difficult to handle on hot rolls, nor is it suitable for sheet or powder rubber. These two methods do not necessarily lead to the same results. Therefore, in case of dispute, the oven method A should be used.

GB/T 24131-2009 Referenced Document

GB/T 14838 Rubber and rubber products.Determination of precision for test method standards
GB/T 15340 Rubber,raw natural and raw synthetic.Sampling and further preparative procedures
GB/T 5576-1997 Rubbers and latices--Nomenclature
GB/T 6038 Rubber test mixes. Preparation, mixing and vulcanization. Equipment and procedures

2018 GB/T 24131.1-2018 Rubber, raw—Determination of volatile matter content—Part 1:Hot-mill method and oven method
2009 GB/T 24131-2009 Rubber,raw.Determination of volatile matter content