abstract
This work aimed to study the effect of the incorporation of graphene nanoplatelets (GRA 0.5% and 1% (w/w)) on the matrices of biobased polymers composed of starch-based materials (B20) and poly(butylene succinate) (PBS) using pine rosin (RES) as a compatibilizer. Three formulations were produced (B20/RES/PBS, B20/RES/PBS/GRA0.5%, and B20/RES/PBS/GRA1%), and their mechanical properties (tensile, flexural, hardness, and impact), rheological behavior, thermal properties (thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC)), chemical analysis (Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectroscopy), and contact angle were evaluated. Hardness (Shore D), tensile, and flexural moduli increased, whereas elongation at break and toughness decreased as GRA content increased. FTIR studies strongly supported the existence of interactions between polymeric matrices and the large surface area of GRA. The viscosity flow curves were well fitted to the Cross-Williams-Landel-Ferry (Cross-WLF) model, and the three formulations exhibited non-Newtonian (shear-thinning) behavior. The analysis of water contact angles indicated that the formulation surfaces have hydrophilic behavior. All the samples are thermally stable, and the results of this study can be used to optimize the application of biobased graphene-based composites for applications in injection molding industries.
keywords
POLY(BUTYLENE SUCCINATE); POLYMER COMPOSITES; STARCH; BEHAVIOR; OXIDE
subject category
Polymer Science
authors
Tavares, L; Sousa, LR; da Silva, SM; Lima, PS; Oliveira, JM
our authors
J. Martinho Oliveira
Coordinator Professor
Loleny Tavares
Junior Researcher
Sara Patrícia Magalhães da Silva
Junior ResearcherProjects
Biobased and Biodegradable Composites (B2-Solutions)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
& nbsp;Fundo Europeu de Desenvolvimento Regional (FEDER): POCI-01-0247-FEDER-048505; CICECO-Aveiro Institute of Materials-FCT/MCTES (PIDDAC): LA/P/0006/2020; CICECO-Aveiro Institute of Materials-FCT/MCTES (PIDDAC): UIDP/50011/2020; CICECO-Aveiro Institute of Materials-FCT/MCTES (PIDDAC): UIDB/50011/2020; TEMA-center for mechanical technology and automation: UIDB/00481/2020; TEMA-center for mechanical technology and automation: UIDP/00481/2020; Centro Portugal Regional Operational Programme (Centro2020): CENTRO-01-0145-FEDER-022083.