Mechanical, vulcametric, and thermal properties of the different 5‐ethylidene 2‐norbornene content of ethylene‐propylene‐diene‐monomer vulcanized with different types and compositions of peroxides

Abstract

Ethylene-propylene-diene-monomer (EPDM) rubber is an important commercial polymer. The vulcanization process significantly changes its thermal, mechanical, and vulcametric properties. This study was carried out to find optimum formulation of EPDM composite for a better application in automotive industry. Sixteen EPDM polymer samples having different 5-ethylidene 2-norbornene (ENB) and ethylene contents were vulcanized with different types and compositions of peroxide and coagents. The mechanical and vulcametric properties of these samples were measured and compared. The type of peroxide, coagent, and EPDM grade affected the mechanical, thermal, and vulcametric properties of the EPDM rubber to some extend. Use of aromatic peroxide and coagent increased the thermal stability slightly. Mechanical properties were changed very slightly with the change of peroxide type for the same content of peroxide and coagent. Scorch time and cure time decreased with initial increase of the peroxide content. EPDM compound vulcanized with BBPIB peroxide and TAC/S coagent has higher cure time than EPDM compound vulcanized with DMBPHa peroxide and TMPTMA coagent. Coran method was used for the modeling of experimental data. Velocity constant for the formation of peroxide radical and polymer radical were found for each case.

Comparative study on mechanical, thermal, viscoelastic and rheological properties of vulcanised EPDM rubber

“…7 Abd-El Salam et al 8 studied the effect of the vulcanising system on the mechanical properties of butyl rubber/ethylene propylene diene monomer general purpose furnace black blends with static and dynamic mechanical analysis. C ¸avdar et al 9 studied on vulcanisation of EPDM rubber with different 5-ethylidene 2-norbornene (ENB) and ethylene contents and different types and compositions of peroxide and coagents. The mechanical and vulcametric properties of these samples were measured and compared.…”

Electron beam irradiation of sulphur vulcanised ethylene propylene diene monomer (EPDM) nanocomposites reinforced by halloysite nanotubes

“…32 Ethylene propylene diene monomer (EPDM) rubber is widely used in practical applications, such as automotive industry and cables, due to its excellent properties, such as softness, elasticity and insulation. [33][34][35][36] It is also used in nuclear power plants, where it is exposed to ionising irradiation for a long time. Synthesis and development of irradiation resistant polymeric materials are strongly desired since the aliphatic polymers are very sensitive to irradiation.…”