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