Abstract
Series of biodegradable polyesters poly(butylene adipate) (PBA), poly(butylene succinate) (PBS), and poly(butylene adipate‐co‐butylene terephthalate) (PBAT) were synthesized successfully by melt polycondensation. The polyesters were characterized by Fourier transform infrared spectroscopy (FTIR), , differential scanning calorimetry (DSC), and gel permeation chromatography (GPC), respectively. The blends of poly(lactic acid) (PLA) and biodegradable polyester were prepared using a twin screw extruder. PBAT, PBS, or PBA can be homogenously dispersed in PLA matrix at a low content (5–20 wt%), yielding the blends with much higher elongation at break than homo‐PLA. DSC analysis shows that the isothermal and nonisothermal crystallizabilities of PLA component are promoted in the presence of a small amount of PBAT.
Highlights
In recent years, considerable interest has been focused on biodegradable polymers due to their obvious environmentfriendly property comparing to conventional nondegradable or slowly degradable synthetic petrochemical-based polymeric materials [1, 2]
The polyesters were characterized by Fourier transform infrared spectroscopy (FTIR), 1 H-NMR, differential scanning calorimetry (DSC), and gel permeation chromatography (GPC), respectively
An increase of the polyester content to 15% does not lead to a significant decrease of the tensile strength and tensile modulus of the poly(lactic acid) (PLA)/poly(butylene succinate) (PBS) (PBAT) blends
Summary
Considerable interest has been focused on biodegradable polymers due to their obvious environmentfriendly property comparing to conventional nondegradable or slowly degradable synthetic petrochemical-based polymeric materials [1, 2]. The flexibility, toughness and melt stability of PLA can be improved by some approaches, such as copolymerization [8, 9], blending [10], and plasticizers addition [11, 12]. In recent years the blends of PLA and biocompatible and biodegradable polymers, such as poly(ε-caprolactone) (PCL) [13], poly(ethylene glycol) (PEG) [14, 15], poly(hydroxy butyrate) (PHB) [16], starch [17], poly(propylene carbonate) (PPC) [18], collagen [19], and PBS [20], have been widely studied for application in drug delivery and tissue engineering. The reaction carried out for another 20 hours under high vacuum (
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