Work

Dual‐Curing Enhances Mechanical Performance of GAP ‐Based Fluorinated Polytriazole–Polyurethane Elastomers

Year: 2025

Type: article

Abstract: ABSTRACT Polymeric binders play a critical role in composite solid propellants by firmly bonding all components, forming the matrix and skeleton, and enhancing toughness to maintain the propellants' structural integrity and mechanical properties. Therefore, developing energetic and tough binders is essential. Glycidyl azide polymer (GAP) is widely used in solid propellants, but its poor flexibility leads to a high glass transition temperature. Introducing fluorine into binders can improve thermal stability, optimize the oxygen balance of solid propellants, reduce oxidizer usage, enhance the utilization of energetic materials, and increase propellant energy. In this study, fluorinated polyether was grafted onto the side chains of GAP 1k via click chemistry to synthesize GAP 1k ‐ g ‐F 3 , which was then dual cured with a multifunctional alkyne‐terminated curing agent and an isocyanate‐based curing agent to prepare GAP 1k ‐ g ‐F 3 ‐PTU. The mechanical properties, thermal stability, and microstructure of the elastomers were characterized by uniaxial tensile testing, dynamic thermomechanical analysis, thermogravimetric analysis, and scanning electron microscopy.

Source: Journal of Applied Polymer Science

DOI: 10.1002/app.70157

Authors: Keyu Liu, Yanqiu Zhou, Liqiong Luo, Rufang Peng, Bo Jin

Institution: Southwest University of Science and Technology

Language: English

Topic: Energetic Materials and Combustion

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Southwest University of Science and Technology, Southwest University

Award: G4755176929