Author(s):
1. Vojislav Aleksić, Republic of Srpska, Bosnia and Herzegovina
2. Ayse Aroguz, Istanbul University, Engineering Faculty, Chemistry Department, Istanbul, Turkey, Turkey
3. Milos Brzic, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
4. Tamara Erceg, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
5. Vladan Micic, Faculty of Technology - University of East Sarajevo, Republic of Srpska, Bosnia and Herzegovina
6. Dragoslav Lukic, Protection and safety, Serbia
7. Jaroslava Budinski-Simendic, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia

Abstract:
Increase in demands of biodegradable polymeric materials opens up a new industrial challenges in which polylactide (PLA) promises high potential. The brittleness characteristics as well as high glass transition temperature (about 60°C) of PLA has a large limitation for its application. Thus lot of efforts has been done for modification of stiff PLA backbone chains using different strategies (blending with polymers, the plasticizer addition, chemical and radiation grafting). The melt blending procedure with flexible polymers is the most cost effective. The polylactide has a narrow processing window due to its tendency to undergo thermal decomposition in the molten state, thus for the preparation of PLA materials the processing parameters are very important. The goal of our work was to improve the toughness of silica reinforced PLA composite materials. Samples based on linear copolymer poly(styrene-b-butadiene-b-styrene) with molecular weight Mw~140000 and different types of PLA (for extrusion, for biaxially oriented films, and for blow molding) were obtained by non-reactive melt blending. The size of silica primary nano particles was 12 and 40 nm. The mass ratio of silica and SBS was varied. Thermal properties of obtained thermoplastic materials were assessed by differential scanning calorimeter. The stress-strain experiments were carried using universal Instron testing equipment.

Key words:
Poly(lactic acid), Thermoplastic elastomer, Composites, Tri-block copolymer

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
25.05.2015.

Conference:
Contemporary Materials 2015 - Savremeni Materijali

Abstract