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Typus
Verschleierung
Bearbeiter
Hindemith
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 132, Zeilen: 7-10, 11-18
Quelle: Mahfuz et al 2008
Seite(n): 6, Zeilen: 6. 38 ff.
Three basic bonds of polyamide 6, i.e. amide N–H at 3297 cm-1, hydroxyl O–H at 2800–3000 cm-1, and carbonyl C=O at 1637 cm-1 were of primary interest. It is seen in Figure 8.11(b) that IR absorbance for each of the three basic bonds has increased significantly, characterized by their sharper and higher peaks. Higher peak and larger area under the curve corresponds to higher absorption of light energy of the chemical bond concerned. In other words, the IR absorbance is a direct measure of the interaction with the molecular environment, indicating that SiO2 reinforcement into polyamide was responsible for such an increase. On the other hand, after functionalization of SiO2 particles, i.e. in Figure 8.11(c), it is seen that the wave number of the three basic bond are maintained, while in addition, a siloxane Si–O–Si bond at 1090 cm-1 is formed which was not seen with Figures 8.11(a). This is what was expected from functionalization; establishing a continuous covalent linkage across the particle (silica) and polymer (polyamide 6) interface [107].

[107] H. Mahfuz, M. Hasan, V. Dhanak, Nanotechnology 19 (2008) 445702 (7pp)

Three basic bonds of nylon 6, i.e., amide N-H @ 3297 cm-1, hydroxyl O-H @ 2800-3000 cm-1, and carbonyl C=O @ 1637 cm-1 were of primary interests. It is seen in Fig 8.b that IR absorbance for each of the three basic bonds has increased significantly characterized by their sharper and higher peaks. The IR absorbance is a direct measure of bond strength indicating that SiO2 reinforcement into nylon was responsible for such increase. On the other hand after functionalization of SiO2 particles, i.e., in

[page 7]

Fig 8.c it is seen that three basic bond strengths are maintained, while in addition, a siloxane Si-O-Si bond @1090 cm-1 is formed which was not seen with Fig 8.a or 8.b.This is what we expected from functionalization; establishing a continuous covalent linkage across the particle (silica) and polymer (Nylon 6) interface.

Anmerkungen

The source is not mentioned. Possibly the passage can also be found in reference [107] (to be checked), but even if this was the case, it would not become clear that the whole documented passage is taken from the source.

In particular, it does not become clear that what is described are not experiments of M . R. S., but of other authors.

Sichter
(Hindemith), SleepyHollow02

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