The agent acts as {TAIL ~ a means} to control {HEAD ~ the degradation} of the composite and the glass fiber 
The agent acts as { TAIL ~ a means } to control { HEAD ~ the degradation } of the composite and the glass fiber
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH