This investigation describes the effect of reactor irradiation on the strength properties of oriented and unoriented nylon filaments. It is found that both the ultimate strength and the elastic modulus of the undrawn sample decreases markedly to a minimum upon receiving a reactor radiation indexed by the thermal neutron component of 6 × 1017 nvt as compared with that of the drawn sample. However, at somewhat higher levels of irradiation the ultimate tensile strength and the modulus of elasticity of the undrawn nylon increases while that of the drawn nylon continues to decrease until they approach to nearly the same level. At still a higher dose of reactor irradiation the ultimate tensile strength of both drawn and undrawn samples drops sharply while the modulus of elasticity increases sharply.
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Hsiao et al. (1960) studied this question.
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