scholarly journals Synthesis, Properties, and Enzymatic Hydrolysis of Poly(lactic acid)-Co-Poly(propylene adipate) Block Copolymers Prepared by Reactive Extrusion

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4121
Author(s):  
Zoi Terzopoulou ◽  
Alexandra Zamboulis ◽  
Dimitrios N. Bikiaris ◽  
Miguel Angel Valera ◽  
Ana Mangas
Keyword(s):  
Lactic Acid ◽  
Block Copolymers ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Synthesis Properties ◽  
High Production ◽  
High Production Cost ◽  
Poly Propylene ◽  
Hydrolysis Of ◽  
Economical Alternative

Poly(lactic acid) (PLA) is a biobased polyester with ever-growing applications in the fields of packaging and medicine. Despite its popularity, it suffers from inherent brittleness, a very slow degradation rate and a high production cost. To tune the properties of PLA, block copolymers with poly(propylene adipate) (PPAd) prepolymer were prepared by polymerizing L-lactide and PPAd oligomers via reactive extrusion (REX) in a torque rheometer. The effect of reaction temperature and composition on the molecular weight, chemical structure, and physicochemical properties of the copolymers was studied. The introduction of PPAd successfully increased the elongation and the biodegradation rate of PLA. REX is an efficient and economical alternative method for the fast and continuous synthesis of PLA-based copolymers with tunable properties.

Analysis of Coir Fiber Reinforced Poly-Lactic Acid (PLA) and Poly-Propylene (PP) Polymeric Composite

2016 ◽  
Vol 852 ◽  
pp. 10-15
Author(s):  
Sahas Bansal ◽  
M. Ramachandran ◽  
Pramod Raichurkar
Keyword(s):  
Lactic Acid ◽  
Natural Fibers ◽  
Polymeric Composite ◽  
Mechanical Tests ◽  
Composite Resins ◽  
Poly Lactic Acid ◽  
Coir Fiber ◽  
Scanning Calorimetry ◽  
Biodegradable Composite ◽  
Poly Propylene

Green composites shaped by mixture of biodegradable polymers and natural fibers have spellbound massive interest in current years due to their environmentally valuable properties and also to decrease our dependency on the non-renewable resources. Due to the environmental advantages and light weight of natural fibers, an increasing quantity of natural fibers has been used to replace synthetic fibers composites. Coir fiber poly-lactic acid (PLA)/ poly-propylene (PP) resin reinforced polymeric composites have been developed with 90o orientation. The composition of PLA and PP for resin preparation is taken in the ratio 95:05 whereas for the composite, resins and coir fiber in 80:20. The compression molding technique is applied and then the tests are carried out. Mechanical tests (Impact and Hardness), Micro structural analysis (Fourier Transform Infrared Spectroscopy and Optical Imaging) and Differential Scanning Calorimetry are conducted. According to the investigational verification, the new biodegradable composite shows significant results on par with synthetic/ man made composites and the advantages of using bio-composites has been indicated with simplicity.

Superhydrophobic functionalization of cutinase activated poly(lactic acid) surfaces

2017 ◽  
Vol 19 (3) ◽  
pp. 816-822 ◽  
Author(s):  
A. Ortner ◽  
A. Pellis ◽  
C. Gamerith ◽  
A. Orcal Yebra ◽  
D. Scaini ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Enzymatic Hydrolysis ◽  
Ring Opening ◽  
Superhydrophobic Surfaces ◽  
Poly Lactic Acid ◽  
Hydrolysis Of

Controlled enzymatic hydrolysis of PLA surfaces, followed by ring opening of AKD, leads to superhydrophobic surfaces (WCA >150°).

scholarly journals Modification of poly(lactic) acid by reactive extrusion and its melt blending with acrylonitrile–butadiene–styrene

2020 ◽  
Vol 69 (9) ◽  
pp. 794-803
Author(s):  
Tobias Abt ◽  
Mohammad Reza Kamrani ◽  
Jonathan Cailloux ◽  
Orlando Santana ◽  
Miguel Sánchez‐Soto
Keyword(s):  
Lactic Acid ◽  
Acrylonitrile Butadiene Styrene ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Butadiene Styrene

scholarly journals Effect of Dicumyl Peroxide on a Poly(lactic acid) (PLA)/Poly(butylene succinate) (PBS)/Functionalized Chitosan-Based Nanobiocomposite for Packaging: A Reactive Extrusion Study

ACS Omega ◽  
2018 ◽  
Vol 3 (10) ◽  
pp. 13298-13312 ◽  
Author(s):  
Monika ◽  
Akhilesh Kumar Pal ◽  
Siddharth Mohan Bhasney ◽  
Purabi Bhagabati ◽  
Vimal Katiyar
Keyword(s):  
Lactic Acid ◽  
Reactive Extrusion ◽  
Poly Lactic Acid ◽  
Dicumyl Peroxide ◽  
Butylene Succinate

Synthesis, properties, and crystallization of the alternating stereocopolymer poly(l-lactic acid-alt-d-lactic acid) [syndiotactic poly(lactic acid)] and its blend with isotactic poly(lactic acid)

2018 ◽  
Vol 9 (18) ◽  
pp. 2446-2457 ◽  
Author(s):  
Hideto Tsuji ◽  
Yuki Arakawa
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Synthesis Properties

The alternating stereocopolymer poly(l-lactic acid-alt-d-lactic acid) or syndiotactic poly(lactic acid) was successfully synthesized by the condensation of the l-lactic acid-d-lactic acid dimer.

Study on Crystallization of Poly (lactic acid)/Poly (propylene succinate) Blends

2018 ◽  
Vol 5 (3) ◽  
pp. 9609-9614
Author(s):  
Panadda Yueagyen ◽  
Amornrat Lertworasirikul
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Poly Propylene

Effect of Block Length and Stereocomplexation on the Thermally Processable Poly(ε-caprolactone) and Poly(Lactic acid) Block Copolymers for Biomedical Applications

2019 ◽  
Vol 1 (12) ◽  
pp. 3354-3365
Author(s):  
Neha Mulchandani ◽  
Arvind Gupta ◽  
Kazunari Masutani ◽  
Sachin Kumar ◽  
Shinichi Sakurai ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Block Copolymers ◽  
Biomedical Applications ◽  
Block Length ◽  
Poly Lactic Acid
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