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Solid Rocket Propellant Photo-Polymerization with an In-House LED-UV Prototype.

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Summary
This summary is machine-generated.

This study explores UV-curable resins as a sustainable alternative to traditional solid rocket propellant manufacturing. The research demonstrates their potential for faster, more flexible production with reduced environmental impact.

Keywords:
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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Aerospace Engineering

Background:

  • Traditional composite solid propellants rely on cast molding, facing limitations in production flexibility, speed, grain geometry, and environmental concerns due to toxic chemicals and high energy use.
  • Photo-curable resins offer a promising alternative, enabling faster, lower-energy UV-curing processes with potential for improved environmental profiles.

Purpose of the Study:

  • To evaluate photo-curable resins as matrices for composite solid propellants, overcoming limitations of traditional cast molding.
  • To characterize the properties of UV-cured composites and assess their suitability for 3D printing of solid rocket propellant grains.

Main Methods:

  • Evaluated photocuring reaction parameters of six resin formulations using Fourier transform infrared spectroscopy.
  • Prepared composites with 75-80 wt% ammonium sulfate as an inert filler.
  • Characterized thermomechanical properties (dynamic thermal-mechanical analysis) and thermal resistance (thermogravimetric analysis).
  • Investigated mechanical properties via tensile tests and assessed 3D printability using an in-house illumination system and X-ray computed tomography for micro-structure analysis.

Main Results:

  • Identified optimal UV-curing parameters for selected resin systems.
  • UV-cured composites with ammonium sulfate exhibited favorable thermomechanical properties and thermal resistance.
  • Demonstrated successful 3D printing of promising resin systems, with micro-structure analysis confirming print fidelity.

Conclusions:

  • Photo-curable resins present a viable, environmentally friendlier alternative to traditional matrices for composite solid propellants.
  • UV-curing technology enables faster production, greater geometric freedom, and reduced energy consumption.
  • The developed 3D printing method shows potential for advanced solid rocket propellant grain manufacturing.