作者: K. Friedrich
DOI: 10.1007/BFB0117509
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摘要: In bulk isotactic polypropylene it is relatively easy to change the morphology of material in a wide range, mainly by different isothermal crystallization conditions. Size, distribution and inner structure spherulites have great influence on crack propagation this material. Due our microscopic investigations paths seems be significant attributing specific resistances regions with molecular structure. From volume portions those their orientation respect external load follows share fracture surface; these fractions resistance values thus determine critical extension force