An alkyl methacrylate , or {HEAD ~ a combination} of alkyl methacrylates, is {TAIL ~ a suitable second comonomer} 
An alkyl methacrylate , or { HEAD ~ a combination } of alkyl methacrylates , is { TAIL ~ a suitable second comonomer }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL