Effects of Electron Beam Irradiation on the Mechanical, Thermal, and Surface Properties of Some EPDM/Butyl Rubber Composites

Polymers

Gabriela Craciun¹  Elena Manaila¹  MariaDaniela Stelescu²  Nicusor Fifere³  Anton Airinei³  Florica Doroftei³  Cristian Varganici³  Daniela Pamfil³ 

[1] National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, Magurele 077125, Romania;National Research and Development Institute for Textile and Leather, Leather and Footwear Institute, 93 Ion Minulescu Street, Bucharest 031215, Romania;Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania;

关键词: EPDM;    electron beam irradiation;    butyl rubbers;    mechanical properties;    thermal stability;    crosslinking;    contact angle;   

DOI  :  10.3390/polym10111206

来源: DOAJ

【 摘 要 】

The effects of electron beam irradiation on the properties of ethylene propylene diene monomer (EPDM)/butyl rubber composites in presence of a polyfunctional monomer were investigated by means of differential scanning calorimetry (DSC), thermal analysis, scanning electron microscopy (SEM), attenuated total reflection absorption infrared spectroscopy (ATR-IR), and mechanical and surface energy measurements. The samples were exposed over a wide range of irradiation doses (20⁻150 kGy). The EPDM matrix was modified with butyl rubber, chlorobutyl rubber, and bromobutyl rubber. The gel content and crosslink density were found to increase with the electron beam irradiation dose. The values of the hardness and modulus increased gradually with the irradiation dose, while the tensile strength and elongation at break decreased with increasing irradiation dose. The EPDM/butyl rubber composites presented a higher thermal stability compared to the initial EPDM sample. The incorporation of butyl rubbers into the EPDM matrix led to an increase in material hydrophobicity. A similar trend was observed when the irradiation dose increased. The greatest change in the surface free energy and the contact angles occurs at an irradiation dose of 20 kGy. The Charlesby⁻Pinner plots prove the tendency to crosslinking as the irradiation dose increases.

【 授权许可】

Unknown