Does rubber use one or two sulfur atoms to crosslink? Does rubber use one or two sulfur atoms to crosslink?
According to the Polymer Database, 
the sulfur bridges formed in the vulcanization process of natural latex are usually comprised of 4-6 sulfur atoms, although this polyssulfide chain can be shorter if the temperature is increased.


  http://polymerdatabase.com/polymer%20chemistry/Vulcanization.html