rubber and polymer

Reading the cure curve: what your rheometer is actually telling you

A rheometer measures torque as cross-links form during vulcanization. The resulting cure curve is the single most important QC test in rubber. Five numbers matter: ML (uncured flo...

Mooney Viscosity and Scorch — Will Your Compound Survive the Mill?

The Mooney viscometer measures whether uncured rubber will process safely. ML 1+4 is the global standard number for raw-rubber and compound acceptance. Run the test longer and you ...

Shore A Shore D and IRHD

Hardness is the most common rubber QC test and the most commonly done wrong. Shore A covers soft-to-medium rubber. Shore D covers hard rubber. IRHD is the only reliable method for ...