Suitable diamines include {HEAD ~ triethylene glycol diamine} and {TAIL ~ tetraethylene glycol diamine} , among others 
Suitable diamines include { HEAD ~ triethylene glycol diamine } and { TAIL ~ tetraethylene glycol diamine } , among others
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH