Naslov
CHARACTERIZATION OF POLY(ETHYLENE OXIDE) MODIFIED WITH DIFFERENT PHENYL HEPTA ISOBUTYL POLYHEDRAL OLIGOMERIC SILSESQUIOXANES

Autori
Stipanelov Vrandečić, Nataša ; Erceg, Matko ; Andričić, Branka ; Blanco, Ignazio ; Bottino, Francesco A.

Izvornik
Journal of thermal analysis and calorimetry (1388-6150) 142 (2020), 5; 1863-1875

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
poly(ethylene oxide) ; polyhedral oligomeric silsesquioxanes ; thermal analysis ; kinetic analysis

Sažetak
Poly(ethylene oxide)/polyhedral oligomeric silsesquioxanes (PEO/POSS) composites were prepared by the melting method. The thermal characteristics of PEO/POSSs were investigated by means of differential scanning calorimetry (DSC) while thermal stability was investigated by the non-isothermal thermogravimetry (TG). The glass transition temperatures, melting temperatures and crystallinity of PEO decrease with the addition of POSS. FTIR analysis also confirms decrease of PEO crystallinity with the addition of POSS. The addition of POSS nanoparticles shifts the beginning of PEO decomposition toward lower temperatures while they do not have a significant effect on the maximum decomposition temperature, maximum decomposition rate and the residual mass. Scanning electron microscopy (SEM) analysis seems to indicate that poor dispersion of POSS nanoparticles causes this worsening in the thermal behavior of the prepared composites. The non- isothermal decomposition of PEO/POSS samples is more complex compared to pure PEO. POSS nanoparticles influence the beginning of the decomposition process and the acivation energy of the decomposition process of PEO, while the kinetic model of the decomposition process of PEO remains the same.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA