The use of renewable resources in the preparation of various industrial materials has been recently revitalized because of environmental concerns. Especially in the polymer field, there is an increasing interest in the use of natural-based oils that are characterized by low toxicity and low migration mainly for their role as biodegradable plasticizers. In this work, we first studied the diffusion of different vegetable oils used as plasticizers of EPDM copolymer. As most of them have poor affinity with the EPDM, we focused on two approaches based on the valorization of Tung Oil i) the limitation of the exudation phenomenon by using the Tung oil as a thermal-reactive vegetable oil able to polymerize (stand oil) during the polymer processing ii) the development of a new system to plasticize and crosslink an EPDM matrix based on thiol-ene and Diels Alder reactions. Structure of the tung oil and Variation of the torque and temperature versus mixing time for the EPDM/tung oil (70/30wt%). Références : -Bétron C, Bounor-Legaré V, Pinel C, Scalabrino G, Djakovitch L, Cassagnau P, Diffusion of modified vegetables oils in thermoplastic polymers, Materials Chemistry and Physics, 2017, 200: 107-120 -Bétron C , Cassagnau P , Bounor-Legare V, Control of diffusion and exudation of vegetable oils in EPDM copolymers, European Polymer Journal, 2016, 82: 102-113