Fotodegradace ?-nukleovaného polypropylenu: Vliv strukturních parametrů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F08%3A63507029" target="_blank" >RIV/70883521:28110/08:63507029 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Photodegradation of ?-Nucleated Polypropylene: The Effect of Structure Parameters

Popis výsledku v původním jazyce

The aim of the work was to observe the influence of melt flow index (MFI) on photooxidative degradability of neat and ?-nucleated polypropylene. The concentration of 0.03 wt. % of specific ?-nucleating agent NJ Star NU 100 was immixed into five commercial grades of polypropylene differing in melt flow index from 0.3 to 1200 g/10 min. Then, compression moulded films prepared from both the neat and ?-nucleated materials were exposed to UV-irradiation for several exposure times. The photodegradation kinetics observed via infrared spectroscopy and expressed by carbonyl index was significantly slower for all ?-nucleated polypropylenes. Melt flow index of the materials slightly influenced the photooxidation kinetics independently on the presence of ?-nucleating agent; the carbonyl index of the material with the lowest MFI increased markedly at the beginning of irradiation as compared to the others materials. However, after prolonged irradiation time, the increase retarded.

Název v anglickém jazyce

Photodegradation of ?-Nucleated Polypropylene: The Effect of Structure Parameters

Popis výsledku anglicky

The aim of the work was to observe the influence of melt flow index (MFI) on photooxidative degradability of neat and ?-nucleated polypropylene. The concentration of 0.03 wt. % of specific ?-nucleating agent NJ Star NU 100 was immixed into five commercial grades of polypropylene differing in melt flow index from 0.3 to 1200 g/10 min. Then, compression moulded films prepared from both the neat and ?-nucleated materials were exposed to UV-irradiation for several exposure times. The photodegradation kinetics observed via infrared spectroscopy and expressed by carbonyl index was significantly slower for all ?-nucleated polypropylenes. Melt flow index of the materials slightly influenced the photooxidation kinetics independently on the presence of ?-nucleating agent; the carbonyl index of the material with the lowest MFI increased markedly at the beginning of irradiation as compared to the others materials. However, after prolonged irradiation time, the increase retarded.

Druh

D - Stať ve sborníku

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GP106%2F07%2FP262" target="_blank" >GP106/07/P262: Mikrofibrilární polymer-polymer kompozity připravované in-situ</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

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

Název statě ve sborníku

PPS-24

ISBN

88-7897-025-5

ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

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Název nakladatele

Polymer Processing Society (IT)

Místo vydání

Salerno

Místo konání akce

Salerno, Italy

Datum konání akce

15. 6. 2009

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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