By R. T. Graf, J. L. Koenig, H. Ishida (auth.), Hatsuo Ishida (eds.)
This booklet includes the court cases of the Symposium on FT-IR Characterization of Polymers, which used to be held below the auspices of the department of Polymer Chemistry, American Chemical Society (ACS) in the course of the annual ACS assembly in Philadelphia, August, 1984. The content material of every paper has been considerably prolonged from the papers awarded through the convention. end result of the unintentional, irrecoverable lack of the full contents of the e-book by means of the pc procedure used for editorial reasons, the booklet of this ebook has been not on time multiple 12 months over the preliminary scheduled date. it's been a continual, troublesome event for the editor in addition to for the authors. a longer Murphy's legislation, -anything can get it wrong is going multiply mistaken- has been confirmed in editor's workplace. It necessitated, in a different way pointless, repeated facts studying in which time the editor had necessary adventure ~n familiarizing himself with each one paper even more than ordinary. The papers during this publication are cutting-edge even after any such hold up. it's the authors satisfaction and integrity towards the standard of every paper that makes the worth of this booklet durable, whereas accountability of the lack of any timeliness rests on the editor's hand. For the aim of reputable files, submission and attractiveness dates needs to be said. All papers have been submitted by means of September, 1984, and have been approved for booklet through November, 1984, after the serious evaluation processes.
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Extra info for Fourier Transform Infrared Characterization of Polymers
Sample text
For internal reflection spectroscopy the effective sample thickness is a function of the wavelength, refractive indices, and angle. To compare the relative intensities of bands within an ATR spectrum, one should correct the ATR spectrum for the wavelength dependence of the effective sample thickness. Conversely, since the effective thickness is a function of the angle of incidence, by valying the incident angle, it is possible in theory to probe different regions of the sample. al. [53) have used this effect to probe the gradient in orientation and changing degree of crystallinity of polypropylene and poly(ethylene terephthalate) uniaxially oriented films.
Spectrosc. ll, 186 (1981). 46. A. Roseler, Infr. Phys. Zi, 349 (1981). 47. A. Rose1er and W. fA, 1 (1984). 48. W. Stobie, B. J. Dignam, J. Opt. Soc. Am. , (1975). 49. N. Jones, D. P, Hawranek, P. P. Young, J. Mol. Struct. il, 21 (1973). Neelakantan, T. Fujiyama, J. J. 9 (1970). Appl. 50. Crawford, and 25 and spectrosc. ~, 51. S. N. Schatz, J. Chem. Phys. ll, 1617 (1961"). 52. L. Allara, Appl. Spectrosc. 11, 358 (1979). 53. P. P. Sung, K. Krishnan, and S. , 193 (1983). Hill, Macromol. 54. J. Dignam, private comraunication (1984).
Infrared (FT-IR) approaches will be made. BACKGROUND A. Polarization Modulation Polarization-modulation is a versatile method for rapidly alternating the polarization states of electromagnetic radiation. , ZnSe) coupled to a piezoelectric driver, to create externally controlled stress-birefringence (photoelastic) modulation [91. Such modulation of the optical polarization state is especially suited for rapid dichroic measurements. Phase sensitive detection ",ith lock-in amplifiers ~s then used to directly deternline the small differential absorbance signal between the two polarization states in a single measurement.
