抄録
In this paper, the effects of intensity of electron beam, variation with age after irradiation of electron beam on viscoelastic behavior of polypropylene resin (PP), which are widely used as medicine containers and so on, were investigated. Concretely, first, PP resins including colorant or not were prepared and samples that variously changed intensity of the electron beam irradiation were made. Viscoelastic test of samples which were irradiated and elapsed time after irradiation of electron beam was carried. The effects of those factors on viscoelastic behavior were discussed. The following results were obtained.
(1) The viscosity of the PP resin is influenced from the electron beam irradiation though a colorant doesn't influence it. The viscosity decreases so that the larger strength of the electron beam irradiation is, the longer the time after it irradiates it is.
(2) The storage modulus of PP resin is not influenced from the colorant, the electron beam irradiation and the elapsed time after irradiation.
(3) The storage modulus of PP resin is not from the colorant and the electron beam irradiation and maintains the same time-temperature equivalent law.
