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Study of the influence of nanoparticles on the performance and the properties of polyamide 6

von Dr. Mohammad Reza Sarbandi

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[1.] Mrs/Fragment 134 01 - Diskussion
Zuletzt bearbeitet: 2015-03-22 13:41:10 WiseWoman
Fornes 2003, Fragment, Gesichtet, Mrs, SMWFragment, Schutzlevel sysop, Verschleierung

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Untersuchte Arbeit:
Seite: 134, Zeilen: 1-10 (complete)
Quelle: Fornes 2003
Seite(n): 265, Zeilen: 3ff
Non-Isothermal crystallization of polyamide 6 nanocomposites fibers

An extensive analysis of non-isothermal crystallization behavior was carried out on pure polyamide 6 and its nanocomposites. To rightfully compare pure polyamide 6 materials with its nanocomposites, it was necessary to extrude the pure polyamide under the same processing conditions used to form the nanocomposites. Regardless of the molecular weight, the extruded materials exhibit faster crystallization than the virgin samples (Figure 8.12 labeled as (1)). There are several possible reasons why such behavior is observed. Faster crystallization may arise from increased nucleation due to the presence of impurities incorporated in the matrix during processing. Memory effects associated with thermal and stress histories that remain present in the sample after annealing in the melt may also lead to an increased rate of crystallization.

Isothermal Crystallization of Nylon 6 Nanocomposites

An extensive analysis of isothermal crystallization behavior was carried out on pure nylon 6 and its nanocomposites. To rightfully compare pure nylon 6 materials with its nanocomposites, it was necessary to extrude the pure polyamides under the same processing conditions used to form the nanocomposites. Figure 9.4 shows the isothermal crystallization behavior of virgin, i.e., from as-received pellets, and extruded nylon 6 materials. Regardless of the molecular weight, the extruded materials exhibit faster crystallization than the virgin samples. There are several possible reasons why such behavior is observed. Faster crystallization may arise from increased nucleation due to the presence of impurities incorporated in the matrix during processing. Memory effects associated with thermal and stress histories that remain present in the sample after annealing in the melt may also lead to an increased rate of crystallization.

Anmerkungen

A source is not mentioned. The description from Fornes' thesis is also to be found at Fornes, T.D. & Paul, D. R. (2003). Crystallization behavior of nylon 6 nanocomposites. In Polymer 44, pp. 3945–3961. The figures referred to are not the same.

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(Hindemith), WiseWoman


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