The substructure M may be selected from a substituted or unsubstituted methylene chain, {TAIL ~ a substituted or unsubstituted oxyalkylene chain}, and {HEAD ~ a silicon} containing chain or combination thereof 
The substructure M may be selected from a substituted or unsubstituted methylene chain , { TAIL ~ a substituted or unsubstituted oxyalkylene chain } , and { HEAD ~ a silicon } containing chain or combination thereof
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH