GB/T 28728-2012 (English Version) PDF

Standard No.: GB/T 28728-2012
Language: Chinese, Available in English version
Release Date: 2012
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 28728-2012

Scope: WARNING—Personnel using this standard should have practical experience in formal laboratory work. This standard does not address all possible safety issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in the relevant national laws and regulations. Scope: This standard specifies the use of ¹ H-NMR Popper (absolute method) and infrared spectroscopy (relative method) to study the microstructure of butadiene monomer and styrene monomer in solution-polymerized SBR (SSBR). Analytical method for the quantitative determination of body content. The expression of styrene content is relative to the mass fraction of the whole polymer. The 1,4-trans structure, 1,4-cis structure and 1,2-vinyl structure contents are expressed as mole fractions relative to the butadiene moiety.

GB/T 28728-2012 Referenced Document

ISO 1407 Rubber — Determination of solvent extract*， 2023-04-25 Update
ISO 1795 Rubber, raw natural and raw synthetic - Sampling and further preparative procedures*， 2017-06-01 Update

2012 GB/T 28728-2012 Determination of the microstructure of solution-polymerized SBR