Hi everyone, is there a possible way to increase the mechanical properties of paraffin without affecting its higher regression behavior?
The tensile strength, elastic modulus and percent elongation of paraffin wax
doped with small concentrations of low density polyethylene (LDPE) were measured. The centrifugal casting process was used to create paraffin wax / LDPE wax hybrid rocket motors. Tensile tests were then performed on samples taken from these test motors. Concentrations from 0 % to 4 % LDPE added to the paraffin wax were tested. The tensile strength, and elastic modulus increased with increasing concentration of LDPE. The results show that paraffin wax motors can be created that have a greaterelastic modulus and similar tensile strengths compared to current solid rocket motors based on HTPB rubber motors. However the paraffin wax motors were found to be less elastic than HTPB with a much lower percent elongation. Void formation, tiny bubblesin the paraffin wax created during the casting process, were found to affect the tensile properties measured.
rEF: Tensile Tests of Paraffin Wax for Hybrid Rocket Fuel Grains
John D. DeSain, Brian B. Brady, Kelly M. Metzler, Thomas J. Curtiss and Thomas V.
Albright
45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
2 - 5 August 2009, Denver, Colorado
enu.kz/repository/2009/AIAA-2009-5115.pdf
Dear Mr Maddali
I dont understand clearly your application but I have worked in a paraffin wax plant some years ago and I used for long time Ethylene Vinyl Acetate copolymer of different grades as an additive in order to increase hardness (penetration test in mm/10), flexibility and melting point modifier.
This EVA are products from Dupont.
Regards
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