結晶性高分子の緩和機構 : 結晶性高分子の構造とレオロジー

概要

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The relaxation time spectrum of crystalline polymers for α transition was obtained by the use of reduced variables logE_r=logE+logT_0/T-logΛ/(1-Λ)+logΛ_0/(1-Λ_0) and logt_r=logt+logT_0/T-(ε'/k is the quantity related to the activation energy of viscosity and (T_0, Λ_0) is the standard (T, Λ). The difference of relaxation time spectrum between amorphous and crystalline polymers is caused by the irregulality of the network structure which is formed by crystalline regions in polymer. The effect of this irregulality to the relaxation time spectrum of crystalline polymers was estimated by perturbation method. The relaxation time of crystalline polymer is given by 1/τ=Σ__(s=0)^^kC_sP^<2s> (p=1, 2, ……, N), where N is the number of segments of a polymer molecule. This relaxation time spectrum is modified from the one of amorphous polymers at the region for short relaxation time.
社団法人日本材料学会の論文
1959-04-15