A shrink fit article is made by extruding {HEAD ~ a silane grafted polymer} which foams, at least at {TAIL ~ its surface}, and cross links 
A shrink fit article is made by extruding { HEAD ~ a silane grafted polymer } which foams , at least at { TAIL ~ its surface } , and cross links
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH