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Spectroscopy of Polymers, Second Edition by J.L. Koenig

By J.L. Koenig

This revised and up to date moment variation of the best-selling reference/text is key analyzing for college kids and scientists who search a radical and functional creation to the sector of polymer spectroscopy. 11 chapters hide the basic elements and experimental purposes of the first spectroscopic tools. the benefits and drawbacks of some of the suggestions for specific polymer platforms also are mentioned. The aim of the writer isn't to make the reader a professional within the box, yet relatively to supply sufficient information regarding different spectroscopic tools that the reader can verify how the on hand recommendations can be utilized to unravel a selected polymer challenge. This moment version comprises new and up to date info on thoughts in IR and NMR, in addition to an all-new bankruptcy on Mass Spectrometry.

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Polym. , Polym. Chem. Ed. 13 (1975) 2277. , J. Macromol. , Chem. A7 (1973) 1231. , Macromolecules 29 (1996) 7727. This Page Intentionally Left Blank Chapter 2 Vibrational spectroscopy of polymers Introduction to vibrational spectroscopy Infrared (IR) spectroscopy is one of the most often used spectroscopic tools for the study of polymers. There are a number of reasons for the success of IR. The IR method is rapid and sensitive with sampling techniques that are easy to use. Also, the instrumentation is inexpensive, the operation of the equipment is simple, and service and maintenance of the equipment are not expensive.

10. The periodic variation of the dipole moment of a chemical bond resulting from the interaction with light of the same frequency as the bond stretching mode of the bond. Vibrational spectroscopy of polymers 48 Raman selection rules The Raman effect is a second order interaction of the electric field of the light and the molecule's dipole moment. It is actually the effect of the photon's electric field on the interaction between the field and the dipole. IR spectroscopy involves a change in polarization, but Raman spectroscopy occurs because of a change in the molecule's polarization.

0. (Reproduced with permission from Ref. [9]. 20 ,--. 01 I 2 3 4 5 8 12 Number of residues in~ouence Fig. 4. Number distribution of monomer sequences calculated from terminal and penultimate models. The reactivity ratios for both models were the same as in Fig. 3. (Reproduced with permission from Ref. [9]. ) the composition and sequence structure. There are only relatively small differences in composition expected theoretically between the two models, as is shown in Fig. 3 [9]. This figure shows the molar ratio in the polymer versus the molar ratio in the feed, x, calculated for reactivity ratios in the intermediate range for the terminal and penultimate models.

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