2012
DOI: 10.1007/s00396-012-2626-x
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Transcrystallization in nanofiber bundle/isotactic polypropylene composites: effect of matrix molecular weight

Abstract: Polyamide 66 (PA 66) nanofiber bundles were first electrospun and then introduced into isotactic polypropylene (iPP) melts to prepare nanofiber bundle/iPP composites. To reveal the influences of matrix molecular weight (M n ) on the transcrystalline layer, three kinds of iPP with different M n were adopted. Polarized optical microscope was employed to investigate the transcrystallinity. In the presence of PA 66 nanofiber bundle, the heterogeneous nucleation distinctly happened in iPP melts. Moreover, the highe… Show more

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Cited by 17 publications
(12 citation statements)
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“…6b. This is owing to the fact that the growth rate of a specific crystal modification in a given iPP based composite is mainly dependent on the crystallization temperature, while the imposed mechanical history prior to the crystallization has no significant influence on it [41]. Furthermore, one can obtain the crystallization induction periods from the intercept of the straight lines in Fig.…”
Section: Influence Of Interfacial Sheath Structure On Crystalline Mormentioning
confidence: 99%
“…6b. This is owing to the fact that the growth rate of a specific crystal modification in a given iPP based composite is mainly dependent on the crystallization temperature, while the imposed mechanical history prior to the crystallization has no significant influence on it [41]. Furthermore, one can obtain the crystallization induction periods from the intercept of the straight lines in Fig.…”
Section: Influence Of Interfacial Sheath Structure On Crystalline Mormentioning
confidence: 99%
“…Generally, the mechanical properties of fiber‐reinforced polymer composites not only depend on the properties of the fibers and polymer matrix, but they also depend on the interfacial adhesion between the fibers and the matrix. In semicrystalline polymer composites, the fibers can act as orientation templates for polymer crystallization . When the fiber nucleates the crystallization of the polymer with its massive nuclei, the restricted development of the spherulites occurs, and the crystal grows unidirectionally normal to the fiber axis.…”
Section: Introductionmentioning
confidence: 99%
“…In polymer/fibre systems, fibres generally act as a nucleating agent and induce highly dense nuclei along the fibre axis. The active nuclei has so high density that it has the advantages of hindering the lateral extension of spherulites and forcing them to grow in the direction perpendicular to the fibre, which results in a transcrystalline layer finally [2][3][4][5][6][7]. The formation mechanisms of TC may be summarized as follows: epitaxy, chemisorption, and stress (or strain).…”
Section: Introductionmentioning
confidence: 98%