TY - JOUR
T1 - Thermal and mechanical properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/cellulose nanowhiskers composites
AU - Ten, Elena
AU - Turtle, Joel
AU - Bahr, David
AU - Jiang, Long
AU - Wolcott, Michael
N1 - Funding Information:
The authors thank National Science Foundation REU program for partial financial support ( DMR-0755055 ).
PY - 2010/5
Y1 - 2010/5
N2 - Bacterial polyester poly(3-hydroxybutyrate-. co-3-hydroxyvalerate) (PHBV) was reinforced with cellulose nanowhiskers (CNW) in 1-5. wt.% concentrations using a solvent casting method. The CNW was prepared from microcrystalline cellulose (MCC) using sulfuric acid hydrolysis. The influence of CNW on the PHBV crystallization, thermal, dynamic mechanical and mechanical properties were evaluated using polarized optical microscope (POM), differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA), tensile and bulge tests, respectively. POM test results demonstrated that CNW was an effective PHBV nucleation agent. Tensile strength, Young's modulus and toughness of PHBV increased with the increasing concentration of CNW. DMA results showed an increased tan δ peak temperature and broadened transition peak, indicating restrained PHBV molecular mobility in the vicinity of the CNW surface. Storage modulus of the PHBV also increased with the addition of CNW, especially at the temperatures higher than the PHBV glass transition temperature. These results indicated that the CNW could substantially increase the mechanical properties of PHBV and this increase could be attributed to the strong interactions between these two phases.
AB - Bacterial polyester poly(3-hydroxybutyrate-. co-3-hydroxyvalerate) (PHBV) was reinforced with cellulose nanowhiskers (CNW) in 1-5. wt.% concentrations using a solvent casting method. The CNW was prepared from microcrystalline cellulose (MCC) using sulfuric acid hydrolysis. The influence of CNW on the PHBV crystallization, thermal, dynamic mechanical and mechanical properties were evaluated using polarized optical microscope (POM), differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA), tensile and bulge tests, respectively. POM test results demonstrated that CNW was an effective PHBV nucleation agent. Tensile strength, Young's modulus and toughness of PHBV increased with the increasing concentration of CNW. DMA results showed an increased tan δ peak temperature and broadened transition peak, indicating restrained PHBV molecular mobility in the vicinity of the CNW surface. Storage modulus of the PHBV also increased with the addition of CNW, especially at the temperatures higher than the PHBV glass transition temperature. These results indicated that the CNW could substantially increase the mechanical properties of PHBV and this increase could be attributed to the strong interactions between these two phases.
UR - http://www.scopus.com/inward/record.url?scp=77954834737&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77954834737&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2010.04.007
DO - 10.1016/j.polymer.2010.04.007
M3 - Article
AN - SCOPUS:77954834737
SN - 0032-3861
VL - 51
SP - 2652
EP - 2660
JO - Polymer
JF - Polymer
IS - 12
ER -