{TAIL ~ The primer coating} chemically bonds to {HEAD ~ the polymer substrate} by developing covalent bonding or cross linking with the substrate 
{ TAIL ~ The primer coating } chemically bonds to { HEAD ~ the polymer substrate } by developing covalent bonding or cross linking with the substrate
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH