| 研究実績の概要 |
Our research focused on the morphological development of an extruded polypropylene (PP) sheet containing the beta-nucleating agent, N,N’-dicyclohexyl-2,6-naphthalenedicarboxamide in the drawing process. We found that the plastic deformation mechanism is strongly dependent on the deformation direction. The molecular weight of polymer matrix influences the evolution of the void structure of an extruded sheet followed by stretching. Moreover, the needle-shaped nucleating agent, acting as defect points, is believed to have facilitated crazing with the formation of microvoids. These findings lead to further understanding of deformation behavior of crystalline polymers and provide the necessary information for the engineering of microporous films.
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