GB/T 8658-2025 Active National standards

GB/T 8658-2025 Rubber,raw styrene-butadiene,emulsion-polymerized—Determination of bound styrene content—Refractive index method

Publish Date: 2025-08-29 Implement Date: 2026-03-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 8658-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Synthetic rubber

ICS Name: Rubber latex and raw rubber

Publish Date: 2025-08-29

Implement Date: 2026-03-01

Publisher: 国家市场监督管理总局、国家标准化管理委员会

Technical Committee: 全国橡胶与橡胶制品标准化技术委员会(SAC/TC 35)

Pages: 16 pages

Scope

本文件描述了一种测定苯乙烯-丁二烯橡胶(SBR)中结合苯乙烯含量的方法。
本文件适用于测定乳液聚合型SBR中结合苯乙烯含量。若能制得适合折光指数仪测定的薄片，也适用于经抽提过的乳液聚合型充油SBR。
本文件不适用于溶液聚合型SBR。

Development Information

Drafting Units:

中国石油天然气股份有限公司石油化工研究院、中国石油天然气股份有限公司兰州石化分公司、中国石油天然气股份有限公司吉林石化分公司、申华化学工业有限公司、中国石油化工股份有限公司齐鲁分公司、中国石油天然气股份有限公司抚顺石化分公司、怡维怡橡胶研究院有限公司、梅特勒托利多科技(中国)有限公司

Drafting Persons:

耿占杰、杜烨、李晓银、秦鹏、宋洁瑞、尚俊平、孟令坤、朱婧、曹彦强、刘随波、王芳、陈海华、曹紫薇、焦胜成、胡文婷、张艳玲

Word Count: 17 Thousand words Pages: 16 pages

Replace the following standards

GB/T 8658-1998 Rubber,raw styrene-butadiene,emulsion-polymerized—Determination of bound styrene content—Refractive index method

Referenced Standards

GB/T 15340-1994 Rubber, raw, natural and synthetic Sampling and further preparative procedures GB/T 15340-2008 Rubber, raw natural and raw synthetic—Sampling and further preparative procedures GB/T 15340-2025 Rubber,raw natural and raw synthetic—Sampling and further preparative procedures

Adopt standards

ISO 2453:2020

Related Standards

GB/T 8089-1987 Replaced

GB/T 8089-1987 Raw natural rubber—Smoked sheets

Publish Date: 1987-07-10

GB/T 8090-1987 Replaced

GB/T 8090-1987 Raw natural rubber—White crepes and pale crepes

Publish Date: 1987-07-10

GB/T 8083-1987 Replaced

GB/T 8083-1987 Raw natural rubber—Standard rubber—Sampling

Publish Date: 1987-07-27

GB/T 8084-1987 Abolished

GB/T 8084-1987 Raw natural rubber—Sample preparation

Publish Date: 1987-07-27

GB/T 8086-1987 Replaced

GB/T 8086-1987 Raw natural rubber—Determination of dirt

Publish Date: 1987-07-27

GB/T 8290-1987 Replaced

GB/T 8290-1987 Natural rubber latex concentrate—Sampling

Publish Date: 1987-11-19