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