Rheologische messungen an polypropylenschmelzen. IV. Einfluß geringer zusätze niedermolekularer organischer stoffe

Frank, Von H. P.

doi:10.1002/apmc.1969.050090109

Angew. Makromol. Chem.

1969

DOI: 10.1002/apmc.1969.050090109

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Rheologische messungen an polypropylenschmelzen. IV. Einfluß geringer zusätze niedermolekularer organischer stoffe

Von H. P. Frank

Abstract: Der Einfluß geringer Konzentrationen (bis zu 1 Gew.‐%) von Anthracen und Chlorparaffin auf das rheologische Verhalten von Polypropylenschmelzen wurde bei 190°C untersucht. Im Gegensatz zu anderen Untersuchungen konnte kein spezifischer Einfluß auf die Schmelzviskosität und die Fließkurven festgestellt werden, außer daß bei verschiedenen Mischungen ein mehr oder weniger starker Abbau auftritt, der das Fließverhalten entsprechend beeinflußt.

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1981

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Cited by 2 publications

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Über die wandreibung von polymerschmelzen in durchflußkapillaren

Natov¹,

Vassileva²,

Avramova³

1979

Angew. Makromol. Chem.

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SUMMARY:The effect of some additives with low molecular weights upon the effective viscosity and slipping in poly(ethylene), poly(propy1ene) and poly(styrene) flow through circular capillaries is studied as a consequence of previous work done. The capillaries are made from different materials: Iron, alloy of copper and zinc, aluminium and poly(tetrafluor0-ethylene). It is noticed that in cases with capillaries made of poly(tetrafluoroethy1ene) the rate of the flow of pure polymers is increased, compared with the rate of the flow through metal capillaries. This effect increases with the increasing of stress and finally reaches 50 percent.One can observe a profound change in slipping and in viscosity behaviour when adding additives with low molecular weight to polymer melts. This effect is characteristic when silicon oil is added to poly(propy1ene) flowing through a poly(tetrafluoroethy1ene) capillary. The relative change of the flow when the conditions are all the same reaches 400%, whereas change through metal capillaries can be neglected.The results show that additives with low molecular weight change the viscosity of the polymer, and when the polymer flows through a poly(tetrafluoroethy1ene) capillary, those additives also change the slipping.

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Über die wandreibung von polymerschmelzen in durchflußkapillaren

Natov¹,

Vassileva²,

Avramova³

1979

Angew. Makromol. Chem.

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Effect of microadditions of zinc stearate and calcium stearate on the rheological properties of polypropylene

Kaloforov¹

1981

Fibre Chem

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Rheologische messungen an polypropylenschmelzen. IV. Einfluß geringer zusätze niedermolekularer organischer stoffe

Cited by 2 publications

References 5 publications

Über die wandreibung von polymerschmelzen in durchflußkapillaren

Über die wandreibung von polymerschmelzen in durchflußkapillaren

Effect of microadditions of zinc stearate and calcium stearate on the rheological properties of polypropylene

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