Such a substance can be one of low molecular weight and capable of one or more double bonds, for example, such as acrylates, methacrylates or {HEAD ~ esters} of {TAIL ~ allyl alcohol}, more particularly 
Such a substance can be one of low molecular weight and capable of one or more double bonds , for example , such as acrylates , methacrylates or { HEAD ~ esters } of { TAIL ~ allyl alcohol } , more particularly
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH