Melt Rheology and Thermal Stability of Nanoclay Filled Poly(3hydroxybutyrate-co-4hydroxybutyrate) Biocomposites

• Published in: Journal of polymers and the environment Vol. 23; no. 2; pp. 165 - 170
• Main Authors: Yang, Jia, Hang, Lina, Dai, Yahui
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-06-2015; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Clay; Composite materials; Environmental Chemistry; Environmental Engineering/Biotechnology; Industrial Chemistry/Chemical Engineering; Materials Science; Nanomaterials; Original Paper; Polymer Sciences; Rheology; Shear strength; Viscosity; 4hydroxybutyrate; Melt apparent shear viscosity; Nanoclay; Thermal stability; Poly(3hydroxybutyrate
• ISSN: 1566-2543; 1572-8919; 1572-8900
• DOI: 10.1007/s10924-014-0692-5

Melt apparent shear viscosity for poly(3hydroxybutyrate-
co
-4hydroxybutyrate) composites filled with nanoclay was measured by means of a capillary rheometer at temperatures ranging from 140 to 160 °C and apparent shear rates varying from 13 to 1,198 s
−1
, and thermal stability was conducted on a thermogravimetric analyzer for the composites. The results showed that the effects of extrusion conditions and the nanoclay content on the flow behavior were obvious for the composite melts. The composite melts were pseudoplastic, and the non-Newtonian indexes increased with the temperature increasing. The sensitivity of apparent shear viscosity for the composite melts to temperature increased with the nanoclay content increasing, and decreased with the apparent shear rate increasing. With the nanoclay content increasing, the melt apparent shear viscosity and the thermal stability decreased for the composites.