ISSN:
1022-1352
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The surface microstructure of the cast films of syndiotactic and stereocomplex poly(methyl methacrylate)s (PMMA) was studied by the attenuated total reflection IR (IR/ATR) method. For comparison, the bulk structure was analyzed by transmission IR spectroscopy. For the syndiotactic PMMA, the relative intensity of the “crystalline” band at 860 cm-1 to the “amorphous” band at 841 cm-1 in the IR/ATR spectra indicates that the degree of crystallinity is enhanced or reduced near the surface region, depending on the degree of polymer stereoregularity and the contacting medium. For a stereocomplex PMMA film it was found that the surface regions are less crystalline than the bulk of the film. The relative intensity of the peak at 750 cm-1 to that at 758 cm-1 in the IR spectra also indicates that the stereocomplex film contains an excess of the syndiotactic component in the surfaces and that the surface enrichment is stronger at the air-side surface.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1996.021970228
