GB/T 14837.3-2018 English PDF (GBT14837.3-2018)

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GB/T 14837.3-2018: 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
GB/T 14837.3-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.060
G 40
GB/T 14837.3-2018 / 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
(ISO 9924-3:2009, IDT)
ISSUED ON: MARCH 15, 2018
IMPLEMENTED ON: OCTOBER 1, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 6
3 Principle ... 6
4 Reagents ... 6
5 Apparatus ... 6
6 Preparation of Samples ... 7
7 Procedure ... 7
8 Expression of Results ... 9
9 Test Report ... 12
10 Precision ... 13
Annex A (Informative) Recommended Procedures ... 14
Annex B (Informative) Examples of Thermogram ... 15
Annex C (Informative) Precision ... 20
Bibliography ... 22
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 and Plastics
Research and Design Institute Co., Ltd.; Triangle Tyre Co., Ltd.; Shenyang Rubber Research and
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 and 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.