THE WAY OF STEREOREGULARITY DETERMINATION OF POLYPROPYLENE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F08%3APU76084" target="_blank" >RIV/00216305:26310/08:PU76084 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

THE WAY OF STEREOREGULARITY DETERMINATION OF POLYPROPYLENE

Popis výsledku v původním jazyce

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, s

Název v anglickém jazyce

THE WAY OF STEREOREGULARITY DETERMINATION OF POLYPROPYLENE

Popis výsledku anglicky

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, s

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GA104%2F07%2F1631" target="_blank" >GA104/07/1631: Vliv tepelné historie na morfologii a lomové chování rázových kopolymerů polypropylenu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2008

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemické listy

ISSN

1213-7103

e-ISSN

—

Svazek periodika

102

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—