The present disclosure relates to a method for manufacturing a three- dimensional (3D) object with an additive manufacturing system, comprising a step consisting in printing layers of the 3D object from the part material comprising a polymeric component comprising, based on the total weight of the polymeric component: - from 5 to 95 wt. % of at least one polymer (P1) comprising at least 50 mol. % of recurring units (R1) consisting of an arylene group comprising at least one benzene ring, each recurring unit (R1) being bound to each other through C-C bonds, wherein the recurring units (R1) are such that, based on the total number of moles of recurring units (R1) : - less than 90 mol. % are rigid rod-forming arylene units (R1-a), and - at least 10 mol. % are kink-forming arylene units (R1-b), and - from 5 to 95 wt. % of at least one polymer (P2), having a glass transition temperature (Tg) between 140°C and 265°C, and no melting peak, as measured by differential scanning calorimetry (DSC) according to ASTM D3418.