Influence of drawing on molecular mobility in polypropylene fibres studied by nuclear magnetic resonance

Murín, J.; Olčák, Dušan

doi:10.1007/bf02340338

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…The temperature dependencies of the second moment M 2 calculated from the NMR spectra measured on the i ‐PP, EPDM rubber, and i ‐PP/EPDM blend are depicted in Figure 3. In the case of i ‐PP the temperature dependency of the second moment M 2 agrees with results described in our previous studies 11, 12. The second moment takes up the values of about 16 × 10 −4 T 2 at temperatures below 270 K. It is known that the CH 3 side‐group rotations and rigid main chains are responsible for this value 13, 14.…”

Section: Resultssupporting

confidence: 91%

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line ¹H‐NMR

Olčák¹,

Onufer

Mucha

et al. 2003

J of Applied Polymer Sci

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The broad-line 1 H-NMR study of the polymer blend composed of isotactic polypropylene and ethylene-propylene-diene monomer rubber was carried out. The NMR measurements were performed on the samples of the polymer blend and on the components of the blend in the temperature range covering the glass-transition regions of all studied polymers. Conclusions were drawn from the temperature dependencies of the second moment M 2 and of the data obtained by the decomposition of the spectra into the components related to the motionally distinct regions of the partially crystalline polymer. The mass fractions of the amorphous, intermediate, and crystalline domains and the widths of the spectra related to the particular phases were computed from the spectra. A double glass transition was revealed for the polymer blend. Different mechanisms of the motional processes related to the glass transition were deduced from the data. The gradual increase of the number of the chains and the enhancement of the chain mobility within noncrystalline regions of the polymer blend are responsible for the motion related to the lower glass transition and only transformation of the hindered motion into free motion was found in the temperature region of the upper glass transition.

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Section: Resultssupporting

confidence: 91%

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line ¹H‐NMR

Olčák¹,

Onufer

Mucha

et al. 2003

J of Applied Polymer Sci

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“…There are several papers dealing with relaxation properties of the partially crystalline PP by using the pulsed NMR techniques [1][2][3][4][5][6]. A lot of investigators [4,7,8] analysed the broad-line NMR spectrum.…”

Section: Introductionmentioning

confidence: 99%

Study of stretched polypropylene fibres by pulsed and CW NMR spectroscopy

Ševčovič

Mucha

2009

Solid State Nuclear Magnetic Resonance

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Influence of drawing on molecular mobility in polypropylene fibres studied by nuclear magnetic resonance

Cited by 2 publications

References 15 publications

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line ¹H‐NMR

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line ¹H‐NMR

Study of stretched polypropylene fibres by pulsed and CW NMR spectroscopy

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Influence of drawing on molecular mobility in polypropylene fibres studied by nuclear magnetic resonance

Cited by 2 publications

References 15 publications

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line 1H‐NMR

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line 1H‐NMR

Study of stretched polypropylene fibres by pulsed and CW NMR spectroscopy

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Product

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Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line ¹H‐NMR

Study of motional processes in polymer blends composed of isotactic polypropylene and ethylene–propylene–diene monomer rubber by broad‐line ¹H‐NMR