The polyisobutylene 120 and the polyisobutylene 122 are polyisobutylene that is disposed adjacent to {HEAD ~ the front surface} of {TAIL ~ the substrate}  
The polyisobutylene 120 and the polyisobutylene 122 are polyisobutylene that is disposed adjacent to { HEAD ~ the front surface } of { TAIL ~ the substrate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH