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Rubber modifiers can do more than increase flexibility in thermoset resins. By changing crack-tip stress, promoting energy dissipation, and improving fracture resistance, materials such as CTBN and ATBN can help control crack growth while maintaining the required strength and processing performance.

Reactive liquid rubbers such as HTPB, CTPB, CTBN, HTBN, ATBN and ATPB differ mainly in their terminal functional groups and polymer backbones. Those structural differences determine curing behavior, resin compatibility, flexibility, oil resistance and toughening performance. This article compares the main reactive liquid rubber families, explains where each type fits, and examines their development in aerospace, automotive, composites, sustainable materials and additive manufacturing.

Purity differences in sublimation-grade Fullerene C60 can affect melt behavior, dispersion, surface quality, dimensional stability, and consistency during polymer extrusion. The article compares 99.5%, 99.9%, and 99.95% C60 grades and their processing implications.

Liquid polybutadiene selection depends on more than viscosity or flexibility. The article compares molecular structure, vinyl content, functionality and processing behavior across coatings, adhesives, sealants and other polymer systems.

Rubber phase separation plays a major role in how CTBN and other reactive liquid rubbers toughen epoxy systems. The article examines domain formation, compatibility, curing behavior, and the balance between toughness and mechanical strength.

CTBN and ATBN both improve epoxy toughness, but their different terminal groups affect curing, phase separation, adhesion, and final mechanical performance. This comparison looks at where each reactive liquid rubber fits in epoxy formulations and what to consider when selecting between them.