What question did this study set out to answer?

The aim is to improve interfacial performance between HTPB-based polyurethanes and polar propellants via chemical modification.

April 26, 2026FirePhysChemOpen Access

Preparation and Interfacial Enhancement of Polyether-Modified HTPB-Based Polyurethane Based on Step-Growth Polymerization and Microphase Structure Control

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Randomized trial investigates interfacial adhesion in HTPB polyurethanes, suggesting effective modification methods.

The aim is to improve interfacial performance between HTPB-based polyurethanes and polar propellants via chemical modification.
Incorporated polar polyether segments into HTPB backbone through step-growth copolymerization.
Investigated the effects of different polyether types and contents on mechanical and interfacial properties.
Employed various characterization techniques including mechanical testing and microscopy.
N210 modification resulted in a 623% increase in elongation at break and reduced water contact angle from 113.8° to 80.1°.
N210-modified liners showed cohesive fracture failure mode, indicating enhanced interfacial adhesion.
PTMEG-modified systems provided balanced mechanical properties across 10–30 wt% composition range.

Xu et al. (2026) studied this question.

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