GB/T 14837.3-2018Rubber and rubber products -- Determination of the composition of vulcanizates and uncured compounds by thermogravimetry -- Part 3: Hydrocarbon rubbers, halogenated rubbers and polysiloxane rubbers after extraction (English PDF)

Foreword

GB/T 14837 Rubber and Rubber Products - Determination of the Composition of Vulcanizates

and Uncured Compounds by Thermogravimetry consists of the following 3 parts:

--- Part 1: Butadiene, ethylene-propylene copolymer and terpolymer, isobutene-isoprene,

isoprene and styrene-butadiene rubbers;

--- Part 2: Acrylonitrile-butadiene and halobutyl rubbers;

--- Part 3: Hydrocarbon rubbers, halogenated rubbers and polysiloxane rubbers after

extraction.

This Part is Part 3 of GB/T 14837.

This Part was drafted as per the rules specified in GB/T 1.1-2009.

This Part uses translation method to equivalently adopt ISO 9924-3:2009 Rubber and Rubber

Products - Determination of the Composition of Vulcanizates and Uncured Compounds by

Thermogravimetry - Part 3: Hydrocarbon Rubbers, halogenated Rubbers and Polysiloxane

Rubbers after Extraction.

The Chinese documents that have a consistent correspondence with the international documents

referenced in this Part are as follows.

--- GB/T 2941-2006 Rubber - General procedures for preparing and conditioning test pieces

for physical test methods (ISO 23529:2004, IDT);

--- GB/T 3516-2006 Rubber - Determination of solvent extract (ISO 1407:1992, MOD).

This Part was proposed by China Petroleum and Chemical Industry Federation.

This Part shall be under the jurisdiction of General Test Methods Sub-Committee of National

Technical Committee on Rubber and Rubber Products Standardization Administration of China

(SAC/TC 35/SC 2).

Chief drafting organizations of this Part: Guizhou Tyre Co., Ltd.; Northwest Rubber & Plastics

Research and Design Institute Co., Ltd.; Triangle Tyre Co., Ltd.; Shenyang Rubber Research &

Design Institute Co., Ltd.; Aeolus Tyre Co., Ltd.; Giti Radial Tire (Anhui) Company Ltd.;

Double Coin Tire Co., Ltd.; EVE Rubber Institute Co., Ltd.; Beijing Physical and Chemical

Analysis and Testing Center; Guangzhou Synthetic Materials Research Institute Co., Ltd.;

Xishuangbanna Comprehensive Inspection Center of Quality and Technology Supervision;

Beijing Research & Design Institute of Rubber Industry; and Yanshan Branch, SINOPEC

Beijing Research Institute of Chemical Industry.

Chief drafting staffs of this Part: Lv Qiang, Zhou Ji, Wu Jing, Han Wenxia, Ni Shujie, Xu

Rubber and Rubber Products

- Determination of the Composition

of Vulcanizates and Uncured Compounds

by Thermogravimetry - Part 3: Hydrocarbon Rubbers,

Halogenated Rubbers and Polysiloxane Rubbers after Extraction

WARNING: Persons using this Part should be familiar with normal laboratory practice.

This Part does not purport to address all of the safety problems, if any, associated with its

use. It is the responsibility of the user to establish appropriate safety and health practices

to ensure compliance with any regulatory conditions.

CAUTION: Certain procedures specified in this Part may involve the use or generation

of substances, or the generation of waste, that could constitute a local environmental

hazard. Reference should be made to appropriate documentation on safe handling and

disposal after use.

1 Scope

This Part of GB/T 14837 specifies a thermogravimetric method for the determination of the

main constituents of rubber compounds such as elastomer(s), carbon black and mineral filler.

This method establishes the "fingerprint" of the tested material. However, the result does not

always correspond exactly to the theoretical formula of the rubber.

This Part applies to raw or compounded rubbers, vulcanized and unvulcanized, after

preliminary extraction.

This Part applies to rubbers with hydrocarbon backbones (NR, BR, SBR, IIR, EPDM, ACM,

AEM, etc.) used alone or as mixtures. For the mixtures, the polymer content corresponds to the

total rubber, and it is not usually possible to identify individual polymers.

This Part applies to rubbers with halogenated hydrocarbon backbones (CR, CSM, FKM, CM,

CO, ECO, etc.) or containing nitrogen (NBR, HNBR, NBR/PVC, etc.), as well as to their

mixtures. However, these rubbers often form carbonaceous residues which interfere with the

analysis. Application of an appropriate procedure minimizes these interferences.

This Part also applies to rubbers with a polysiloxane backbone (VMQ, etc.) and to rubbers not

listed above.

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