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Statements

Subject Item
n2:RIV%2F61989100%3A27640%2F04%3A00011001%21RIV%2F2005%2FMSM%2F276405%2FN
rdf:type
n12:Vysledek skos:Concept
dcterms: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. 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 chemical owing to f 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 chemical owing to f
dcterms:title
Influence of metals on the phenol - formaldehyde resin degradation in friction composites Vliv kovů na degradaci fenol-formaldehydových pryskyřic ve frikčním procesu Influence of metals on the phenol - formaldehyde resin degradation in friction composites
skos:prefLabel
Vliv kovů na degradaci fenol-formaldehydových pryskyřic ve frikčním procesu Influence of metals on the phenol - formaldehyde resin degradation in friction composites Influence of metals on the phenol - formaldehyde resin degradation in friction composites
skos:notation
RIV/61989100:27640/04:00011001!RIV/2005/MSM/276405/N
n3:strany
49-60
n3:aktivita
n13:P
n3:aktivity
P(ME 343)
n3:cisloPeriodika
84
n3:dodaniDat
n17:2005
n3:domaciTvurceVysledku
n5:7087845 n5:4296729 n5:8851999
n3:druhVysledku
n9:J
n3:duvernostUdaju
n16:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
567929
n3:idVysledku
RIV/61989100:27640/04:00011001
n3:jazykVysledku
n4:eng
n3:klicovaSlova
phenol-formaldehyde resin;friction composite;thermal degradation
n3:klicoveSlovo
n10:thermal%20degradation n10:friction%20composite n10:phenol-formaldehyde%20resin
n3:kodStatuVydavatele
BE - Belgické království
n3:kontrolniKodProRIV
[6FBC461C4AFB]
n3:nazevZdroje
Polymer Degradation and Stability
n3:obor
n15:JI
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n18:ME%20343
n3:rokUplatneniVysledku
n17:2004
n3:svazekPeriodika
Neuveden
n3:tvurceVysledku
Filip, Peter Peter, R. Křístková, Monika Weiss, Zdeněk
s:issn
0141-3910
s:numberOfPages
12
n8:organizacniJednotka
27640