The lock in can be achieved by, for example, exposure of {TAIL ~ the multilayer} to {HEAD ~ chemical or thermal polymerization conditions} 
The lock in can be achieved by , for example , exposure of { TAIL ~ the multilayer } to { HEAD ~ chemical or thermal polymerization conditions }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD