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Wu等在研究尼龙-6(N6)与双马来酸酐接枝改性EPDM共混体(超韧尼龙)冲击强度(S_l)与橡胶含量(V_f)关系时得到了脆韧转变的主曲线,该主曲线表明:分散相EPDM在N6基体中分散的形态可用分散相相邻粒子间的面间距(亦称基体层厚度,T)来定量描述。而T可由分散相粒径(d)、体积分数(V_f)按(1)式计算得出:
Wu et al. Obtained the main curve of brittle-ductile transition when studying the relationship between the impact strength (S_l) and the rubber content (V_f) of nylon-6 (N6) and bismaleic anhydride grafted EPDM blends The main curve shows that the morphology of disperse phase EPDM dispersed in N6 matrix can be quantitatively described by the interplanar distance between adjacent particles of disperse phase (also referred to as the base layer thickness, T). While T can be calculated from (1) by the particle size (d) and the volume fraction (V_f)