Once the predetermined temperature has been reached, the shape memory material recovers its shape and in the process applies a stress that results in the creation of a path for {HEAD ~ the two substances} to come in {TAIL ~ contact} 
to come in
Once the predetermined temperature has been reached , the shape memory material recovers its shape and in the process applies a stress that results in the creation of a path for { HEAD ~ the two substances } to come in { TAIL ~ contact }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL