Radiation hardness of some polymers and epoxy glues

The radiation hardness of polysulphone and polycarbonate and also epoxy glues ELK-5 and CMK-5 was studied. These organic materials are being used for production of coordinate detectors. With that end in view dependences of maximum and maximum permissible loads and Brinell hardness on the absorbed doze for polymers were studied. For glues dependences of breaking point and relative lengthening on the stretching were studied. Irradiations were carried out on the experimental reactors providing a stream of fast neutrons with an energy spectrum in a range 0.1 - 20 MeV. The average energy of a γ-component of the beam was 1.5-2 MeV and maximal one was up to 9 MeV. The maximal absorbed doze for glues was ∼ 100 kGy and for the polymers was ∼ 1000 kGy. The results of measurements have shown a weak dependence of mechanical properties to the investigated polymers and glues on the absorbed doze that allows one to use them for detectors production within the framework of LHC project. (author)