Joint Effects of Molecular Structure and Processing History on Specific Nucleation of Isotactic Polypropylene

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F09%3A63508234" target="_blank" >RIV/70883521:28110/09:63508234 - isvavai.cz</a>

Alternative codes found

RIV/61389013:_____/09:00330320

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Joint Effects of Molecular Structure and Processing History on Specific Nucleation of Isotactic Polypropylene

Original language description

The interrelation between specific ?-nucleation, thermal history, and molecular weight of isotactic polypropylene (PP) has been investigated by wide-angle X-ray scattering, differential scanning calorimetry, and scanning electron microscopy. Samples witha broad range of molecular weight (Mw), from 240 000 to 1 300 000, allowed to examine the effect of PP molecular structure on the nucleation sensitivity. N,N`-Dicyclohexylnaphthalene-2,6-dicarboxamide (NU 100) was introduced in the concentrations of 0,0.01, and 0.03 wt % as a ?-specific nucleating agent into neat PP. Specimens were then processed via compression molding at various processing temperatures and times. Samples containing 0.01 wt % of NU 100 showed a dramatic decrease of nucleation activity into ?-phase with increasing Mw, processing time, and temperature. This effect was ascribed to a partial solubility of nucleator in PP melt and a competition between heterogeneous ?-nucleation and self ?-nucleation.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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Project

<a href="/en/project/GP106%2F07%2FP262" target="_blank" >GP106/07/P262: Microfibrillar polymer-polymer composites prepared in-situ</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2009

Confidentiality

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

Name of the periodical

Macromolecules

ISSN

0024-9297

e-ISSN

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Volume of the periodical

19

Issue of the periodical within the volume

42

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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