ICS 83.060 CCS G 35 T/CSTM 00539 E—2021 Liquid r andom acrylonitrile- butadiene rubber 无规羧基液体丙烯腈 -丁二烯橡胶 (English Translation) Issue d by Chinese Society for Testing & Materials, Zhongguancun Issue date:202 2-11-11 Implementation date ：2023-02-11 CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00539E —2021 Foreword CSTM FC 05/TC 02 (The chemical materials field committee of Chinese Society for Testing & Materials) is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative. This document is drafted in accordance with the rules given in the GB/T 1.1 —2020 Directives for standardization — Part 1: R ules for the structure and drafting of standardizing documents . Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identi fying any or all such patent rights. This document was proposed by Field Committee CSTM/FC 05, Chemical materials . This document was prepared by Field Committee CSTM /FC 05, Chemical materials , Technical committee TC02, Rubber. CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00539E —2021 Liquid random acrylonitrile -butadiene rubber 1 Scope This document specifies the requirements and inspection rules of liquid random acrylonitrile -butadiene rubber (L-XNBR) . The test methods, the items on packaging, marking, transportation and storage are specified. This document is applicable to L -XNBR synthesized by free radical emulsion copolymerization of butadiene, acrylonitrile and acrylic acid or methacrylic acid with sodium dodecyl sulfate as emulsifier at a certain temperature. 2 Normative references The follo wing documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced documen t (including any amendments) applies. GB/T 1632.1 , Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part1: General principles GB/T 4498.1 —2013 , Rubber — Determination of ash — Part 1: Muffle furnace method GB/T 8170 —2008, Rules of rounding off for numerical values and expression and judgement of limiting values GB/T 24131.1 —2018, Rubber, raw — Determination of volatile matter content — Part 1: Hot -mill method and oven method SH/T 1149, Synthetic rubber latex — Sampling SH/T 1157.1, Rubber, raw — Determination of bound acrylonitrile content in acrylonitrile -butadiene rubber (NBR) — Part 1: Combustion (Dumas) method SH/T 1157.2, Rubber, raw — Determination of bound acrylonitrile content in acrylonitrile -butadiene rubber (NBR) — Part2: Kjeldahl method 3 Term s and definitions No terms and definitions are listed in this document. 4 Requirements 4.1 Appearance L-XNBR is a brown viscous liquid. 4.2 Technical requirements The technical requirements of L-XNBR shall be as specified in Table 1. CSTMhQÆSÑ^Ou( 全国团体标准信息平台