De-Vulcanisation Conditions and Mechanical Properties of Re-Vulcanised Rubber for EPDM. Continuous Reclamation of Rubber by Shear Reaction Control Technology (Part II)

摘要

Continuous devulcanisation by shear flow stage reaction control technology has been developed. In this technology it is very effective to give high shear straing to vulcanised rubber under high internal pressure. Using adequate screw geometry and alignment based on this concept, devulcanisation can proceed continuously., Properties of devulcanised rubber depend on reaction temperature, screw rotation and addition of devulcanising agent and process oil. Under adequate reaction temperature and screw rotation, devulcanisation can proceed without devuclanising agent and process oil. Revulcanised rubber obtained by this condition shows excellent mechanical properties almost equal to virgin ones. Furthermore, mechanical properties of revulcanised rubber can controlled by the addition of devulcanising agent and process oil.