2) initiator for the polymerizable monomer starting materials present in an amount from 0.1 to approximately 2 parts by weight per 100 parts by {HEAD ~ weight} of {TAIL ~ the polymerizable monomer} starting materials, 
of
2 ) initiator for the polymerizable monomer starting materials present in an amount from 0.1 to approximately 2 parts by weight per 100 parts by { HEAD ~ weight } of { TAIL ~ the polymerizable monomer } starting materials ,
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 TAIL OTH OTH OTH