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Effect of the degree of atacticity and degree of crystallization on the dynamic-mechanical properties of polypropylene

I. Šimek and J. Šmíd

Slovak Technical University, Bratislava


Abstract: The dynamic-mech. properties of polypropylene at low frequencies (∼1 cycle/sec.), detd. by the method of free torsion swings, were described. The position of the temp. of the main β-dispersion max. (1-5°) decreases slightly with increasing concn. of the atactic component (0-15%). The height of the β max. is directly proportional to the concn. of the atactic component. The resulting β-dispersion max. and the crystn. follow the regressive dependence on the atacticity. There is a very close, practically linear indirect relation between the atacticity and crystn. at temps. above 0°. 50 references.

Full paper in Portable Document Format: 201a43.pdf (in Slovak)


Chemical Papers 20 (1) 43–54 (1966)

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