Overview
ISO 12965:2000 specifies a laboratory method for determining the microstructure of butadiene rubber (BR / polybutadiene) by infra‑red spectrometry (IR / FTIR). The method uses a cast film of extracted rubber on a salt plate, records a spectrum from 2000 cm⁻¹ to 600 cm⁻¹, and calculates cis, trans and vinyl contents from peak absorbances. The standard includes sample preparation, instrumental requirements, calculation procedures and precision data for repeatability and reproducibility.
Key topics and technical requirements
Applications and who uses it
- Quality control labs in rubber and tire manufacturing for incoming raw polybutadiene inspection and batch verification.
- R&D and polymer analysis to characterize polymer microstructure during synthesis or catalyst development.
- Suppliers and formulators verifying cis/trans/vinyl content to meet material specifications.
- Accredited testing laboratories performing standardized IR spectrometry for contractual or regulatory compliance.
Practical benefits include consistent microstructure measurement, comparable interlaboratory data, and a defined workflow for IR-based rubber analysis. Users should follow appropriate laboratory safety and solvent handling protocols.
Related standards
Keywords: ISO 12965, butadiene rubber, microstructure, infra-red spectrometry, FTIR, polybutadiene, cis trans vinyl, rubber testing, IR spectrophotometer.
