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Need to find a way to test propellant burning in vacuum. try to find professional solid prop person to ask about how to simulate this/do appropriate testing
Notes on plasticizers and bonding agents:
- IDP is the overall best plasticizer. There are different plasticizers with slightly better mechanical properties, but are much more difficult to process. (https://d11fdyfhxcs9cr.cloudfront.net/templates/170652/myimages/plasticizers.pdf)
- Increasing percentage of IDP improves processability and pot life. (https://d11fdyfhxcs9cr.cloudfront.net/templates/170652/myimages/plasticizers.pdf)
Looked into an alternative to HTPB: PBAN (used on NASA boosters). But PBAN is more difficult to mix, and has similar performance. (https://www.nasa.gov/returntoflight/system/system_SRB.html) (http://www.braeunig.us/space/propel.htm#:~:text=PBAN%20formulations%20give%20a%20slightly,more%20flexible%20than%20PBAN%20binder)