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