TY - JOUR
T1 - Study of solid and microcellular injection-molded poly(butylenes adipate- co -terephthalate)/poly(vinyl alcohol) biodegradable parts
AU - Peng, Jun
AU - Zhang, Chunmei
AU - Mi, Haoyang
AU - Peng, Xiang Fang
AU - Turng, Lih Sheng
PY - 2014/5/21
Y1 - 2014/5/21
N2 - Microcellular injection molding using supercritical fluid (SCF) as a physical blowing agent is capable of producing lightweight, dimensionally stable plastic parts while using less material. To improve strength and foamability of the biodegradable poly(butylenes adipate-co-terephthalate) (PBAT), poly(vinyl alcohol) (PVA) was used to compound the biodegradable PBAT/PVA blends. It was found that the tensile mechanical properties (i.e., the Young's modulus and ultimate strength) of both the solid and microcellular injection molded PBAT/PVA parts increase with increasing PVA content and the enhancement depends on their blend composition, morphology, and microstructure. As the PVA weight ratio increases, the PVA domains in the solid parts change from tiny, dispersed droplets to elongated filaments, to a cocontinuous structure, and finally to a continuous phase after phase inversion. The evolving microstructure and molecular entanglement result in various rheological melt characteristics and changes in complex viscosity. For foamed parts, the fractured surface of the microcellular injection molded parts present a multilayer structure and the PVA domains help to increase the cell densities as well as the tensile properties. The results provide useful insights into foaming PBAT/PVA blends with tunable microstructures and tensile mechanical properties.
AB - Microcellular injection molding using supercritical fluid (SCF) as a physical blowing agent is capable of producing lightweight, dimensionally stable plastic parts while using less material. To improve strength and foamability of the biodegradable poly(butylenes adipate-co-terephthalate) (PBAT), poly(vinyl alcohol) (PVA) was used to compound the biodegradable PBAT/PVA blends. It was found that the tensile mechanical properties (i.e., the Young's modulus and ultimate strength) of both the solid and microcellular injection molded PBAT/PVA parts increase with increasing PVA content and the enhancement depends on their blend composition, morphology, and microstructure. As the PVA weight ratio increases, the PVA domains in the solid parts change from tiny, dispersed droplets to elongated filaments, to a cocontinuous structure, and finally to a continuous phase after phase inversion. The evolving microstructure and molecular entanglement result in various rheological melt characteristics and changes in complex viscosity. For foamed parts, the fractured surface of the microcellular injection molded parts present a multilayer structure and the PVA domains help to increase the cell densities as well as the tensile properties. The results provide useful insights into foaming PBAT/PVA blends with tunable microstructures and tensile mechanical properties.
UR - http://www.scopus.com/inward/record.url?scp=84901218327&partnerID=8YFLogxK
U2 - 10.1021/ie500451s
DO - 10.1021/ie500451s
M3 - 文章
AN - SCOPUS:84901218327
SN - 0888-5885
VL - 53
SP - 8493
EP - 8500
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 20
ER -