The first polymer contains {HEAD ~ a polymer} having at least 70% α olefin units and is characterized by a melting temperature lower than the melting temperature of {TAIL ~ the exterior surface portion} of the core 
The first polymer contains { HEAD ~ a polymer } having at least 70 % α olefin units and is characterized by a melting temperature lower than the melting temperature of { TAIL ~ the exterior surface portion } of the core
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH