Morphology of polypropylene/silica nano- and microcomposites

Anđela Pustak (Avtor), Irina Pucić (Avtor), Matjaž Denac (Avtor), Iztok Švab (Avtor), Janez Pohleven (Avtor), Vojko Musil (Avtor), Ivan Šmit (Avtor)

Povzetek

The aim of this study was to compare the effects of different silica grades on the structure and morphology of isotactic polypropylene (iPP)/silica composites to better understand their structure-property relationships. Isotactic polypropylene composites with 2, 4, 6, 8 vol % of added silica fillers differing in particle size (micro- vs. nanosilica) and surface modification (untreated vs. treated surface) were prepared by nonisothermal compression molding and characterized by different methods. The addition of all silica fillers grades to the iPP matrix significantly influenced the spherulitic morphology, while phase characteristics of the iPP matrix seemed to be unaffected. Surface modification of silica fillers exhibited stronger effects on spherulite size than size of silica particles. Nonpolar silica particles, more miscible or compatible with iPP chains than polar silica particles, enabled better spherulitic growth. The spherulite sizes tended to reach equal values at 8 vol % of added silicas showing that spherulite size became independent of filler concentration and surface modification above optimum filler concentration.

Ključne besede

polipropilen;mehanske lastnosti;strukturni odnosi;morfologija;kompoziti;

Podatki

Jezik:	Angleški jezik
Leto izida:	2013
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM EPF - Ekonomsko-poslovna fakulteta
UDK:	678
COBISS:	11340828
ISSN:	0021-8995
Št. ogledov:	925
Št. prenosov:	104
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
URN:	URN:SI:UM:
Vrsta dela (COBISS):	Delo ni kategorizirano
Strani:	str. 3099-3106
Letnik:	ǂVol. ǂ128
Zvezek:	ǂno. ǂ5
Čas izdaje:	2013
ID:	1434840