How do you account for cured HTPB in ProPEP and similar thermodynamic tools?
For example, let's say I have a composite propellant with a binder
that uses R45 HT at 5.70%, and this is cured with IPDI at 0.54%.
There are entires for R45 HT and IPDI of course, but in reality what
is present in my cured propellant is 6.24% of a cured polyurethane.
I have just noticed that there is an entry in the PEPCODED.DAF file
titled "HTPB/CURATIVE" - is this a generic entry for cured HTPB?
G 475 HTPB/CURATIVE (JOS) 656C 978H 5N 13O 0 0 -498 .0329
Or does it not really matter and I am worrying about something that
really has no significant effect on the outcome of the calculation?
Thanks,
James
