Vol: 33 , Nr: 4 , Art.: 4
Tytuł / Title:
Mechanical and thermal properties of PET/POSS nanocomposites
Autorzy / Authors:
Instytut Technologii Materiałów Politechniki Poznańskiej
Słowa kluczowe / key words:
PET/POSS nanocomposites, mechanical and thermal properties
Streszczenie / Summary:

Polyethylene terephtalate PET and polyhedral oligomeric silsesquioxane (POSS) nanocomposites
were prepared by melt mixing. The mechanical and thermal properties of PET/POSS
nanocomposites with three different types of POSS (heptaisobuthylotrihydroxy – POSS1;
octatisdimethylosiloxyethyloepoxy – POSS2, and octatisdimethylosiloxy glicydoksypropylo –
POSS3) and two weight percentage contents (0.2 and 0.5) have been measured. There were no
significant changes in the mechanical properties of obtained PET/POSS nanocomposites while the
thermal properties changed significantly. DSC study shows big influence of silsesquioxanes type
and their percentage content on the crystallization temperature and crystalinity of PET/POSS
nanocomposites. The crystallization temperature increased by 5.1oC for PET/POSS1, while for
PET/POSS2 and PET/POSS3 decreased by 24.4oC and 13.7oC, respectively. Introduction of any
POSS type into PET have a strong influence on the crystalization of PET/POSS nanocomposites.
Observed crystalinity of obtained nanocomposites changed from 34 % in PET to 19 % (for POSS3
0.2 weight percentage) and 43 % (for POSS2 0.2 weight percentage).