This is the post-print version of the following article: Cuenca, VE; Martinelli, H; Ramirez, MD; Ritacco, HA; Andreozzi, P; Moya, SE, Polyphosphate Poly(amine) Nanoparticles: Self-Assembly, Thermodynamics, and Stability Studies, Langmuir, 2019, 35 - 44 (14300-14309) DOI: 10.1021/acs.langmuir.9b02636 This article may be used for non-commercial purposes in accordance with ACS Terms and Conditions for Self-Archiving.