On nylon 6 and nylon 6/EPDM blends the influence of water on the glass transition temperature, mechanical properties, and the ductile transition temperature was studied. Blends of 10% and 20% were prepared with a particle size of 0.3 µm and the tensile properties, flexural moduli, torsion moduli, and notched izod impact strength were studied as functions of water concentration. The ductile transition temperature in polyamides can be lowered by plasticizing the nylon and by a rubber particle-induced process; both processes show some synergistic effects.
Gaymans, R. J., Borggreve, R. J. M., & Spoelstra, A. B. (1989). Ductile transition in nylon-rubber blends: influence of water. Journal of applied polymer science, 37(2), 479-486. https://doi.org/10.1002/app.1989.070370214