Influence of metals on the phenol - formaldehyde resin degradation in friction composites

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F04%3A00011001" target="_blank" >RIV/61989100:27640/04:00011001 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Influence of metals on the phenol - formaldehyde resin degradation in friction composites

Original language description

Degradation process and influence of metal particles (Cu, Fe, CuZn) on the stability of acid catalyzed (novolak) phenolic resin during curing and friction process in friction composites have been studied. Using TGA, FTIR and Py-GC methods, the significant influence of copper and iron chips, in case of high metal concentrations, on degradation process during curing of novolac phenolic resin has been found. The same behavior was confirmed for friction process. It follows that copper and iron can act as catalysts and therefore the model mechanisms for metal catalysis were proposed. The key role in the phenolic resin degradation process belongs to the elimination of formaldehyde, as an important curing agent, caused by metal and metal oxide catalysis. Brass (CuZn) does not influence the stability regardless of concentration but the wear characteristics after friction process of brass containing samples were extremely high if compared to other ones. Brass influence is rather physical as che

Czech name

Vliv kovů na degradaci fenol-formaldehydových pryskyřic ve frikčním procesu

Czech description

Byl zkoumán degradační proces a vliv kovových částic (Cu, Fe,CuZn) na stabilitu fenolycké pryskyřice (novolak) během frikčního procesu ve frikčních kompozitech.Ve vzorcích s vyskou koncentrací kovových částic byl za pomocí TGA, FTIR a Py-GC zjištěn zásadní vliv měděných a železných částic na degradační proces fenolyckých pryskyřic. Stejné chování bylo zaznamenáno pro frikční proces.

Type

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

CEP classification

JI - Composite materials

OECD FORD branch

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Project

<a href="/en/project/ME%20343" target="_blank" >ME 343: Research of friction materials</a><br>

Continuities

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

Publication year

2004

Confidentiality

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

Name of the periodical

Polymer Degradation and Stability

ISSN

0141-3910

e-ISSN

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Volume of the periodical

Neuveden

Issue of the periodical within the volume

84

Country of publishing house

BE - BELGIUM

Number of pages

12

Pages from-to

49-60

UT code for WoS article

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EID of the result in the Scopus database

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