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Updated: Aug 3, 2025

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

Atom Transfer Radical Polymerization of Functionalized Vinyl Monomers Using Perylene as a Visible Light Photocatalyst

Published on: April 22, 2016

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

Andrea Galavotti¹, Camilla Noè², Giovanni Polizzi³

¹Department of Aerospace Science and Technology, Politecnico di Milano, Via La Masa 34, 20156 Milano, Italy.

|April 13, 2023

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:

HTPB PBDDA additive manufacturing composite solid propellant photo-polymerization polymer binder

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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.