Hi Andrew,

sulfur as S8 ? or do you mean something else ?

As far as I know, dicyclopentadiene is usually polymerized by ROMP and copolymerization is posible but comonomer has to display some double bonds

Dicyclopentadiene is unsaturated and reacting it with S8 can cause the formation of sulfide and disulfide crosslinks to give polymers of the type:(- D-S-D-SS- D-) etc.  Since dicyclopentadiene has more than one double bond, the linear chains depicted above can crosslink to give a 3-D polymeric solid.

Arbenin,

You will find a clear answer to your question in

---  Bordoloi, Binoy K.; Pearce, Eli M.; Blight, L.; Currell, B. R.; Merrall, R.; Scott, R. A. M.; Stillo, C. Journal of Polymer Science, Polymer Chemistry Edition (1980), 18(2), 383-406.

"The initial reaction between DCP and sulfur is reported to give low-molecular-weight

polysulfides (e.g., tri- and pentasulfides).~ As the reaction proceeds

at 14OoC, these are converted to higher-molecular-weight polymer....... The

low-molecular-weight polysulfides formed with DCP, e.g., exo-cyclic trithia

derivative of DCP (i.e., DCPS3), appear to be “intermediate” in the sulfur-DCP

copolymerization. The sulfur-DCP copolymerization apparently follows a

step-growth mechanism of polymerization."

Good luck