scholarly journals Effects of poly(lactic acid) and polybutylene succinate ratios on properties of composite foams containing activated carbons

2019 ◽  
Author(s):  
Darunee Aussawasathien ◽  
Kittimasak Ketkul ◽  
Kittipong Hrimchum ◽  
Poonsub Threepopnatkul
Keyword(s):  
Lactic Acid ◽  
Activated Carbons ◽  
Poly Lactic Acid ◽  
Composite Foams ◽  
Polybutylene Succinate

Poly(Lactic Acid)-Polybutylene Succinate-Activated Carbon Composite Foams

2017 ◽  
Vol 751 ◽  
pp. 344-349 ◽  
Author(s):  
Kittimasak Ketkul ◽  
Poonsub Threepopnatkul ◽  
Darunee Aussawasathien ◽  
Kittipong Hrimchum
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Activated Carbon ◽  
Void Fraction ◽  
Extrusion Process ◽  
Carbon Composite ◽  
Poly Lactic Acid ◽  
Composite Foam ◽  
Composite Foams ◽  
Polybutylene Succinate

Polymer blends of poly (lactic acid) (PLA) and polybutylene succinate (PBS) containing activated carbon (AC) were foamed by using Azodicarbonamide (ADC) through an extrusion process. The composite foams containing 5 phr of AC had lower density than those without AC loading for PLA:PBS ratios of 90:10, 80:20, 70:30, and 60:40. The incident of higher void fraction was the consequences of more foaming nucleation centers which were induced by adding AC in the composite foam. Maximum reduction of density by 50% with the void fraction of 50% was achieved when both ADC and AC were applied at 5 phr with the PLA:PBS ratio of 80:20. The addition of AC in composite foams enhanced the crystallization in PBS phase but had no effects on PLA crystallinity. The thermal stability of composite foams with and without AC dosages for each PLA:PBS proportion was slightly changed. For PLA-PBS blend foams, the more PLA loading there was the more tensile strength and modulus there would be. For PLA-PBS-AC composite foams, AC could improve the modulus and tensile strength of composite foams in PBS-rich samples whereas no effect on PLA-rich samples.

Injection‐stretch blow molding of poly (lactic acid)/polybutylene succinate blends for the manufacturing of bottles

2021 ◽  
pp. 51557
Author(s):  
Clizia Aversa ◽  
Massimiliano Barletta ◽  
Annamaria Gisario ◽  
Rosa Prati ◽  
Silvia Vesco
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Blow Molding ◽  
Polybutylene Succinate ◽  
Stretch Blow Molding

Lead ion removal characteristics of poly(lactic acid)/hydroxyapatite composite foams prepared by supercritical CO2 process

2011 ◽  
Vol 32 (9) ◽  
pp. 1408-1415 ◽  
Author(s):  
Byung Jin Jeon ◽  
Young Gyu Jeong ◽  
Byung Gil Min ◽  
Won Seok Lyoo ◽  
Sang Cheol Lee
Keyword(s):  
Lactic Acid ◽  
Supercritical Co2 ◽  
Lead Ion ◽  
Poly Lactic Acid ◽  
Ion Removal ◽  
Composite Foams ◽  
Hydroxyapatite Composite ◽  
Lead Ion Removal

Injection Moldable Poly(Lactic Acid)-Poly(Butylene Succinate)-Activated Carbon Composite Foams: Effects of PLA/PBS Ratios

2019 ◽  
Vol 798 ◽  
pp. 322-330
Author(s):  
Kittipong Hrimchum ◽  
Darunee Aussawasathien ◽  
Todsapol Kajornprai
Keyword(s):  
Lactic Acid ◽  
Activated Carbon ◽  
Cell Density ◽  
Void Fraction ◽  
Crystallization Temperature ◽  
Poly Lactic Acid ◽  
Flow Index ◽  
Foam Density ◽  
Butylene Succinate ◽  
Composite Foams

Poly (lactic acid) (PLA)-poly (butylene succinate) (PBS)-activated carbon (AC) composites were foamed via an injection molding process. Azodicarbonamide (ADC) was used as a chemical blowing agent. The effect of PLA/PBS ratios (0/100, 10/90, 20/80, 30/70, 40/60, 50/50 wt% and vice versa) on the cell formation and properties of composite foams such as cellular structure, foam density (ρf), void fraction (Vf), cell density, melt flow index (MFI), thermal and mechanical properties and crystallinity were investigated. At same ADC and AC loadings (5 phr), PBS acted as nucleating sites for cell generation and expansion at low contents ( 40 wt%). However, the cell size had a tendency to decrease at high PBS concentrations (> 40 wt%). The cell density of composite foams was somewhat constant at PLA/PBS ratios up to 60/40 wt% and then continuously increased as the PBS dosage was higher than 40 wt%. The maximum reduction of foam density with the void fraction of 20% was obtained at the PLA/PBS ratio of 60/40. The melt viscosity of composite foams increased with the increase of PBS loadings. The tensile strength and Young’s modulus of composite foams decreased while the elongation at break and impact strength increased as the proportion of PBS increased. The cold crystallization temperature (Tcc) of PLA in the composite foam tended to decrease with the reduction of PLA contents while the melting temperatures (Tm) of PLA in composite foams fluctuated without any trend compared with those of the unfoamed PLA. The Tcc of PLA in composite foams could not be detected when the content of PBS was higher than 40 wt%. The crystallization temperature (Tc) and Tm of PBS in composite foams was almost unchanged for each PLA/PBS proportion compared with those of the unfoamed PBS. The crystallinity (Xc) of PLA in composite foams increased compared with the unfoamed PLA at PBS contents of 0-20 wt% due to the nucleating effect of PBS and AC. The Xc of PLA (at PBS > 20 wt%) and PBS in composite foams decreased with the reduction of each polymer.

Electrical Properties of Heat-Treated Poly-Lactic Acid

2011 ◽  
Vol 131 (5) ◽  
pp. 395-400 ◽  
Author(s):  
Toru Oi ◽  
Katsuyoshi Shinyama ◽  
Shigetaka Fujita
Keyword(s):  
Lactic Acid ◽  
Electrical Properties ◽  
Poly Lactic Acid ◽  
Heat Treated
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