2021
DOI: 10.3390/polym13030462
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Morphology-Mechanical Performance Relationship at the Micrometrical Level within Molded Polypropylene Obtained with Non-Symmetric Mold Temperature Conditioning

Abstract: The control of the structural properties of a polymeric material at the micro and nano-metrical scale is strategic to obtaining parts with high performance, durability and free from sudden failures. The characteristic skin-core morphology of injection molded samples is intimately linked to the complex shear flow, pressure and temperature evolutions experienced by the polymer chains during processing. An accurate analysis of this morphology can allow for the assessment of the quality and confidence of the proce… Show more

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Cited by 6 publications
(2 citation statements)
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“…), with different semi-crystalline characteristics between the skin, shear, and core layers [65][66][67]. By increasing the mold temperature, the shear and skin layers reduce in thickness, providing more volume to the spherulitic core layer [68][69][70]. Morphological analysis on PHBHHx samples produced at mold temperatures M from 40 • C to 80 • C was performed in order to investigate the process-induced microstructure.…”
Section: Influence Of the Mold Temperature On Process-induced Microst...mentioning
confidence: 99%
“…), with different semi-crystalline characteristics between the skin, shear, and core layers [65][66][67]. By increasing the mold temperature, the shear and skin layers reduce in thickness, providing more volume to the spherulitic core layer [68][69][70]. Morphological analysis on PHBHHx samples produced at mold temperatures M from 40 • C to 80 • C was performed in order to investigate the process-induced microstructure.…”
Section: Influence Of the Mold Temperature On Process-induced Microst...mentioning
confidence: 99%
“…Nanoindentation is most often used for the characterization of polymers considered homogeneous such as amorphous polymers like PMMA [22][23][24][25], PC [24,26], or PS [24]. For semi-crystalline polymers, nanoindentation was used on commercial samples prepared by conventional manufacturing processes, such as injection molding or extrusion, that usually induce a microstructure gradient between the skin and the core of the sample [27][28][29][30][31][32][33]. These studies aimed to evaluate the mechanical response in the different zones (skin-transition-core layers) of the prepared sample.…”
Section: J O U R N a L P R E -P R O O Fmentioning
confidence: 99%