Abstract
We examined the molecular and structural variables that govern tensile properties of isotactic polypropylene forming spherulitic morphology. The polypropylenes were crystallized in such a manner as to develop as a wide range as possible in the values of the independent structural variables that describe the solid state. The initial deformations depend strongly on the amorphous regions but are independent of the spherulite size and lamellar thickness. At yield point the lamellae within spherulites were found to be fragmented and replaced by a highly oriented fibrous structure in the post-yield region.
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Nitta, Kh., Yamaguchi, N. Influence of Morphological Factors on Tensile Properties in the Pre-yield Region of Isotactic Polypropylenes. Polym J 38, 122–131 (2006). https://doi.org/10.1295/polymj.38.122
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DOI: https://doi.org/10.1295/polymj.38.122