Detail publikačního výsledku

THE WAY OF STEREOREGULARITY DETERMINATION OF POLYPROPYLENE

HOZA, A.; KRATOCHVÍLA, J.; HERMANOVÁ, S.

Originální název

THE WAY OF STEREOREGULARITY DETERMINATION OF POLYPROPYLENE

Anglický název

THE WAY OF STEREOREGULARITY DETERMINATION OF POLYPROPYLENE

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

The purpose of this contribution is to evaluate and compare isotactic index determination of polypropylene homopolymer by extraction and solubility methods. A series of nine PP powder samples possessing molecular weights in the range from 29 -103 to 154-03 g/mol was investigated. Both the methods afforded fractionation of polypropylene into two portions, the soluble fraction and the insoluble one. Extractions were carried out in a modified Kumagawa extractor. Solvent extracts were obtained from polypropylene powders using several organic solvents (n-pentane, n-hexane, n-heptane, and n-octane) at their boiling points. Soluble fractions were prepared by dissolving polypropylene powder in high boiling solvents (xylene, decahydronaphthalene, and 1,2,3,4-tetrahydronaphthalene) and cooling polymer solutions to 23 degree C. All the fractions were characterized using 13C-NMR, DSC, and SEC methods. Comparison of extraction and solubility methods showed a significant differences in the amount, structure, molecular weight, and crystalinity of soluble and insoluble fractions

Anglický abstrakt

The purpose of this contribution is to evaluate and compare isotactic index determination of polypropylene homopolymer by extraction and solubility methods. A series of nine PP powder samples possessing molecular weights in the range from 29 -103 to 154-03 g/mol was investigated. Both the methods afforded fractionation of polypropylene into two portions, the soluble fraction and the insoluble one. Extractions were carried out in a modified Kumagawa extractor. Solvent extracts were obtained from polypropylene powders using several organic solvents (n-pentane, n-hexane, n-heptane, and n-octane) at their boiling points. Soluble fractions were prepared by dissolving polypropylene powder in high boiling solvents (xylene, decahydronaphthalene, and 1,2,3,4-tetrahydronaphthalene) and cooling polymer solutions to 23 degree C. All the fractions were characterized using 13C-NMR, DSC, and SEC methods. Comparison of extraction and solubility methods showed a significant differences in the amount, structure, molecular weight, and crystalinity of soluble and insoluble fractions

Klíčová slova

Isotactic index, polypropylene, extraction

Klíčová slova v angličtině

Isotactic index, polypropylene, extraction

Autoři

HOZA, A.; KRATOCHVÍLA, J.; HERMANOVÁ, S.

Rok RIV

2010

Vydáno

09.09.2008

ISSN

1213-7103

Periodikum

CHEMICKE LISTY

Svazek

102

Číslo

15

Stát

Česká republika

Strany od

s1202

Strany do

s1206

Strany počet

5