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Statements

Subject Item
n2:RIV%2F70883521%3A28150%2F12%3A43867995%21RIV13-MSM-28150___
rdf:type
skos:Concept n13:Vysledek
dcterms:description
Polypropylene (PP) nanocomposites were prepared by melt intercalation using an intermeshing co-rotating twin-screw extruder. The influence of organoclay (Cloisite 20A) and maleic anhydride modified polypropylene (PP-MA) on various properties was explored. The effect of the initial melting temperature on crystallization kinetics was investigated by differential scanning calorimetry (DSC) and optical microscopy. DSC has revealed a gradual decrease in crystallization kinetics with an increase in initial melting temperature for two-component systems (PP/PP-MA and PP/20A). However, in the case of a three-component system (PP/PP-MA/20A), the decrease of crystallization kinetics in the range of initial melting temperature being 200-240 A degrees C was followed by an increase in the temperature range 240-260 A degrees C. After initial melting at 250 A degrees C, many spherulites were discovered in the three-component system. This unusual crystallization behavior was explained with the help of Fourier transform infrared spectroscopy (FTIR), where an increase in the Si-O peak with the increasing initial melting temperature was detected, which indicates the presence of large surface of clay layers. The morphology of nanocomposites was also investigated by transmission electron microscopy (TEM). The X-ray diffraction (XRD) analysis has revealed a decrease in the peak intensity with an increase in initial melting temperature, which suggests exfoliation caused by fast diffusion at high temperatures. Polypropylene (PP) nanocomposites were prepared by melt intercalation using an intermeshing co-rotating twin-screw extruder. The influence of organoclay (Cloisite 20A) and maleic anhydride modified polypropylene (PP-MA) on various properties was explored. The effect of the initial melting temperature on crystallization kinetics was investigated by differential scanning calorimetry (DSC) and optical microscopy. DSC has revealed a gradual decrease in crystallization kinetics with an increase in initial melting temperature for two-component systems (PP/PP-MA and PP/20A). However, in the case of a three-component system (PP/PP-MA/20A), the decrease of crystallization kinetics in the range of initial melting temperature being 200-240 A degrees C was followed by an increase in the temperature range 240-260 A degrees C. After initial melting at 250 A degrees C, many spherulites were discovered in the three-component system. This unusual crystallization behavior was explained with the help of Fourier transform infrared spectroscopy (FTIR), where an increase in the Si-O peak with the increasing initial melting temperature was detected, which indicates the presence of large surface of clay layers. The morphology of nanocomposites was also investigated by transmission electron microscopy (TEM). The X-ray diffraction (XRD) analysis has revealed a decrease in the peak intensity with an increase in initial melting temperature, which suggests exfoliation caused by fast diffusion at high temperatures.
dcterms:title
Effect of initial melting temperature on crystallization of polypropylene/organoclay nanocomposites Effect of initial melting temperature on crystallization of polypropylene/organoclay nanocomposites
skos:prefLabel
Effect of initial melting temperature on crystallization of polypropylene/organoclay nanocomposites Effect of initial melting temperature on crystallization of polypropylene/organoclay nanocomposites
skos:notation
RIV/70883521:28150/12:43867995!RIV13-MSM-28150___
n13:predkladatel
n14:orjk%3A28150
n3:aktivita
n9:Z n9:S n9:P
n3:aktivity
P(ED2.1.00/03.0111), S, Z(MSM7088352102)
n3:cisloPeriodika
7
n3:dodaniDat
n16:2013
n3:domaciTvurceVysledku
n4:9162496
n3:druhVysledku
n15:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
133095
n3:idVysledku
RIV/70883521:28150/12:43867995
n3:jazykVysledku
n18:eng
n3:klicovaSlova
crystallization kinetics; intercalation; organoclay; nanocomposite; polypropylene
n3:klicoveSlovo
n12:crystallization%20kinetics n12:organoclay n12:nanocomposite n12:intercalation n12:polypropylene
n3:kodStatuVydavatele
KR - Korejská republika
n3:kontrolniKodProRIV
[4294577921E7]
n3:nazevZdroje
Macromolecular Research
n3:obor
n20:CD
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:projekt
n19:ED2.1.00%2F03.0111
n3:rokUplatneniVysledku
n16:2012
n3:svazekPeriodika
20
n3:tvurceVysledku
Trivedi, Krunal Rajendra Mokrejš, Pavel Kolomazník, Karel Svobodová, Dagmar Svoboda, Petr
n3:wos
000305236400001
n3:zamer
n6:MSM7088352102
s:issn
1598-5032
s:numberOfPages
8
n21:doi
10.1007/s13233-012-0096-0
n7:organizacniJednotka
28150