The Open Macromolecules Journal ISSN: 1874-3439

[DOI: 10.2174/1874343901004010044]
Broad Line ¹H NMR Studies of Glass Transition Relaxation Process in Drawn Samples of Polypropylene/EPDM Blend
J. Onufer, O. Fricová, L. Mucha and D. Olcák Pp 44-47

Samples of the isotactic polypropylene (i-PP) and polymer blend composed of i-PP and ethylene-propylenediene monomer rubber (EPDM) have been studied using the broad-line 1H NMR. The NMR measurements were performed on the plate form samples of undrawn and drawn i-PP and on the samples of the polymer blend in the temperature range 200 – 370 K. The effect of drawing and the effect of drawing temperature on relaxation processes related to the glass transitions of both polymers were studied. Drawing results in the increase of chain mobility in i-PP samples as can be deduced from the temperature dependences of the second moment and parameters derived from decomposition of the NMR spectra. A double glass transition was observed in the i-PP/EPDM blend.




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