GB/T 8658-2025

Active

Rubber, raw styrene-butadiene, emulsion-polymerized—Determination of bound styrene content—Refractive index method

乳液聚合型苯乙烯-丁二烯橡胶生胶 结合苯乙烯含量的测定 折光指数法

Standard Type
GBT
ICS
83.040.10
CCS
G35
Status
Active
Issue Date
2025-08-29
Implementation
2026-03-01
Centralized Committee
中国石油和化学工业联合会
Issuing Authority
国家市场监督管理总局、国家标准化管理委员会

Application Summary AI generated

This standard specifies the refractive index method for determining the bound styrene content in raw, emulsion-polymerized styrene-butadiene rubber (SBR). It is applied in quality control and material testing within the rubber manufacturing industry, particularly for verifying the composition of SBR used in tires, footwear, and industrial rubber goods. The method ensures consistent polymer properties by providing a precise measurement of styrene incorporation, which directly affects the rubber's processing behavior and final mechanical performance.

Related Standards

Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.