ELASTIC PROPERTIES OF RADIATION-CROSSLINKED BLOCK-COPOLYMERS

摘要

The equilibrium elastic modulus E ∞ of irradiated diblock (SB) and triblock (SBS) copolymers (S = styrene, B = butadiene) has been studied at 120 and 20℃. We demonstrated that irradiated block-copolymers have E_∞~(120) > 0 at doses R > R_n (the threshold dose of network-formation). At 20℃ the elastic properties of irradiated block-copolymers are represented by the series-parallel model but in irradiated SBS distribution of crosslinks is apparently heterogeneous.