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Yielding behaviour of thermoplastic/elastomer blends cured by gamma irradiation
Author(s) -
Shaltout N A,
Abou Zeid M M,
AbdelAziz M M,
El Miligy A A
Publication year - 2001
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.604
Subject(s) - materials science , composite material , elastomer , thermoplastic elastomer , filler (materials) , curing (chemistry) , irradiation , carbon black , polyethylene , vulcanization , mooney viscosity , yield (engineering) , thermoplastic , natural rubber , compression set , polymer , copolymer , physics , nuclear physics
Mechanical blends of thermoplastic medium density polyethylene (MDPE) and elastomeric ethylene propylene diene monomer (EPDM) have been prepared with a fixed composition of 60/40 wt%. They have been used either in their gum form or loaded with two different reinforcing fillers, high abrasion furnace (HAF) carbon black or precipitated SiO 2 (Hi Sil) of concentration 25–100 phr (parts per hundred parts of resin) with respect to the blend. Curing was achieved by gamma irradiation. Yielding properties (yield stress, yield strain and cold drawing) have been followed as a function of irradiation dose for different blend compositions. Yield stress values increased with irradiation dose and with the content of the reinforcing filler, but yield strain and cold drawing values decreased with irradiation dose and also with the filler content. The data obtained reveal that Hi Sil is more effective as a reinforcing filler, and the prepared blends are suitable for load‐bearing applications. © 2001 Society of Chemical Industry