The abnormal block and black round structure of 50 axletree steel was studied and analyzed using optical microscopy, transmission electron microscopy, electron probe and so on.

Chemistry modification together with blend modification was effective for the modification of the block copolymer. Radiation modification by electron beam and ultraviolet were an important trend.

However, the incompatibility between organic and inorganic materials would cause voids in the face of the heterojunction. And it will block the electron transfer.