Tayloring PS/PCL blends: characteristics of processing and properties

AUTOR(ES)

Morais, Dayanne Diniz de Souza

FONTE

REM, Int. Eng. J.

DATA DE PUBLICAÇÃO

2019-03

RESUMO

Abstract Blends of Polystyrene (PS) and Poly(ε-caprolactone) (PCL) were twin screw extruded, two PSs, with low and high melt flow rate (MFR) were used and their feasibility within PCL investigated by means of torque rheometry, mechanical tests, heat deflection temperature (HDT) and scanning electron microscopy (SEM); predictive models were utilized to evaluate interfacial adhesion in PS/PCL blends. Results show that no decreasing was verified in torque rheometry plots suggesting thermally stable blends; elastic modulus decreased and elongation at break increased in PS/PCL blends compared to neat PS. PS/PCL blends with low MFR PS and higher PCL amount are more thermodynamically stable. Higher HDT was verified in PS/PCL blends. The trends observed applying predictive models are indicative of poor adhesion between PCL and PS, agreeing with coalescence and phase segregation as verified in SEM images. PS/PCL systems with higher MFR PS presented the best results.

Documentos Relacionados

• Processing and Properties of PCL/Cotton Linter Compounds
• Gelatinized and nongelatinized corn starch/ poly(epsilon-caprolactone) blends: characterization by rheological, mechanical and morphological properties
• Compatibility and characterization of Bio-PE/PCL blends
• Biodegradable sodium alginate and lignosulphonic acid blends: characterization and swelling studies
• Photoluminescence of MEH-PPV/PS blends