The determination of the isotacticity of polypropylene in the 90–100% range by infrared spectroscopy | Zendy

Hughes Richard H. | Zendy

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The determination of the isotacticity of polypropylene in the 90–100% range by infrared spectroscopy

Author(s) -

Hughes Richard H.

Publication year - 1969

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1969.070130302

Subject(s) - tacticity , polypropylene , materials science , infrared , infrared spectroscopy , annealing (glass) , analytical chemistry (journal) , inert gas , inert , calibration curve , spectroscopy , composite material , polymerization , optics , polymer , chemistry , chromatography , physics , organic chemistry , quantum mechanics , detection limit

An infrared method has been developed for the determination of the isotacticity of polypropylene in the 90–100% range. The method requires the annealing of thin films at 165–167°C. for 3 hr. in an inert atmosphere, followed by slow cooling to room temperature. For approximate answers the ratio of the intensity of the 10.00 μ band to that of the 10.27 μ band can be reported as the fraction of isotactic material. Better results are obtained, however, by using Figure 2 as a calibration curve and reading the values from it.

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