George Onslager's pioneering use of aniline derivatives such as thio-carb-ani-lide and MBT in this process in the presence of zinc oxide greatly accelerated this process.  
Stearic acid is sometimes used as an organic activator for this process, while a "dynamic" form of it was first applied to EPDM compounds and generally improves the properties of thermoplastic elastomer blends. George Onslager's pioneering use of aniline derivatives such as thio-carb-ani-lide and MBT in this process in the presence of zinc oxide greatly accelerated this process.  It results in the formation of crosslinks containing sulfur that prevent constituent polymer chains from moving independently, and it was invented by Charles Goodyear. Widely used in the manufacture of tires, for 10 points, identify this procedure that makes rubber more durable, which is named for the Roman god of fire.
Stearic acid is sometimes used as an organic activator for this process, while a "dynamic" form of it was first applied to EPDM compounds and generally improves the properties of thermoplastic elastomer blends.
{vulcanization} [or equivalents]