The Effects of Blending Ratio of Poly(lactic acid)/POSS Cored Star Poly(ε-caprolactone) Biopolymers

Authors : Merve DANDAN DOĞANCI

Pages : 649-660

Doi:10.18596/jotcsa.752190

View : 8 | Download : 3

Publication Date : 2020-10-30

Article Type : Research Paper

Abstract :Abstract: A8-type eight-arm star-shaped polyinsert ignore into journalissuearticles values(ε-caprolactone); insert ignore into journalissuearticles values(PCL); polymers with polyhedral oligomeric silsesquioxane insert ignore into journalissuearticles values(POSS); insert ignore into journalissuearticles values(SP); core having different molecular weight with different chain lengths insert ignore into journalissuearticles values(n=10, 20, 30, and 50 repeating units); were synthesized via arm-first approach by combination of ring-opening polymerization insert ignore into journalissuearticles values(ROP); and “click” chemistry reactions. The obtained polymers were then melt-blended with neat polyinsert ignore into journalissuearticles values(lactic acid); insert ignore into journalissuearticles values(PLA); to improve some of the properties like toughness of PLA. These blends were prepared depending on the blend ratio insert ignore into journalissuearticles values(95/5 and 80/20 wt%); via utilizing laboratory scale twin-screw mini extruder to examine morphological, thermal and mechanical properties of PLA/SP composite as a function of SP and blending ratio. In addition, the PLA/SP composites containing a blend ratio of 90/10 wt% which were prepared in the previous study was used to compare with other composite having different blend ratio. The incorporation of SP polymers improved some of the mechanical properties of PLA. It was verified that SP20 insert ignore into journalissuearticles values(n=20); is the most proper SP-type for enhancing the mechanical behavior of PLA at a blending ratio of 90/10. Also, 1,4-phenylene diisocyanate insert ignore into journalissuearticles values(PDI); which was used as a commercial compatibilizer was incorporated to blends at fixed amount insert ignore into journalissuearticles values(%1);. It is concluded that the incorporation of SP polymers into PLA matrix decreased the tensile modulus with increasing blending ratio and increased the elongation at break values in the presence of PDI.
Keywords : Blending ratio, PCL, PLA, star polymer, POSS