Ternary polymer blends based on poly(lactic acid): Effect of stereo-regularity and molecular weight

2014 ◽  
Vol 132 (14) ◽  
pp. n/a-n/a ◽  
Author(s):  
Sukunya Ross ◽  
Sararat Mahasaranon ◽  
Gareth M. Ross
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Polymer Blends ◽  
Poly Lactic Acid ◽  
Acid Effect ◽  
Ternary Polymer

scholarly journals Poly(lactic Acid): A Versatile Biobased Polymer for the Future with Multifunctional Properties—From Monomer Synthesis, Polymerization Techniques and Molecular Weight Increase to PLA Applications

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1822
Author(s):  
Evangelia Balla ◽  
Vasileios Daniilidis ◽  
Georgia Karlioti ◽  
Theocharis Kalamas ◽  
Myrika Stefanidou ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Chain Extension ◽  
Poly Lactic Acid ◽  
Plastic Pollution ◽  
Practical Applications ◽  
Decomposition Reactions ◽  
Melt Polycondensation ◽  
Polymerization Conditions ◽  
Molecular Weight Increase

Environmental problems, such as global warming and plastic pollution have forced researchers to investigate alternatives for conventional plastics. Poly(lactic acid) (PLA), one of the well-known eco-friendly biodegradables and biobased polyesters, has been studied extensively and is considered to be a promising substitute to petroleum-based polymers. This review gives an inclusive overview of the current research of lactic acid and lactide dimer techniques along with the production of PLA from its monomers. Melt polycondensation as well as ring opening polymerization techniques are discussed, and the effect of various catalysts and polymerization conditions is thoroughly presented. Reaction mechanisms are also reviewed. However, due to the competitive decomposition reactions, in the most cases low or medium molecular weight (MW) of PLA, not exceeding 20,000–50,000 g/mol, are prepared. For this reason, additional procedures such as solid state polycondensation (SSP) and chain extension (CE) reaching MW ranging from 80,000 up to 250,000 g/mol are extensively investigated here. Lastly, numerous practical applications of PLA in various fields of industry, technical challenges and limitations of PLA use as well as its future perspectives are also reported in this review.

Biodegradable polymer blends of poly(lactic acid) and poly(ethylene glycol)

1997 ◽  
Vol 66 (8) ◽  
pp. 1495-1505 ◽  
Author(s):  
Mihir Sheth ◽  
R. Ananda Kumar ◽  
Vipul Dav� ◽  
Richard A. Gross ◽  
Stephen P. McCarthy
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Polymer Blends ◽  
Biodegradable Polymer ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Blends of low molecular weight of poly lactic acid (PLA) with gondorukem (gum rosin)

2018 ◽  
Author(s):  
Mujtahid Kaavessina ◽  
Sperisa Distantina ◽  
Achmad Chafidz ◽  
Aditya Utama ◽  
Venisa Mega Puteri Anggraeni
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Low Molecular Weight ◽  
Gum Rosin

Study of the Properties of Plasticised Poly(Lactic Acid) with Poly(1,3-Butylene Adipate)

2008 ◽  
Vol 16 (9) ◽  
pp. 597-604 ◽  
Author(s):  
Wang Ning ◽  
Zhang Xingxiang ◽  
Yu Jiugao ◽  
Fang Jianming
Keyword(s):  
Molecular Weight ◽  
Lactic Acid ◽  
Glass Transition ◽  
Renewable Resources ◽  
Migration Rate ◽  
Poly Lactic Acid ◽  
Elongation At Break ◽  
Thermally Induced ◽  
Migration Resistance ◽  
Area Of Application

Poly(lactic acid) (PLA) is a biodegradable thermoplastic that can be produced from renewable resources, and so was considered as a major alternative to petroleum-based plastics for packaging applications. However, plasticisation of PLA was required in order to obtain films with sufficient flexibility. Poly(1, 3-butylene adipate) (PBA) was used as a novel plasticiser for PLA, and acetyltributyl citrate (ATBC) was used as the control. FTIR revealed that interaction took place between PLA and plasticiser. With an increasing plasticiser content, storage modulus and glass transition temperature decreased, but elongation at break increased. The elongation at break of PBA-plasticised PLA (PBA content 30 wt.%) could be above 600%, higher than that of ATBC-plasticised PLA (ATBC content 30 wt.%). Moreover, PBA was able to restrain thermally induced migration of plasticiser in plasticised PLA. It was also found that the migration rate of ATBC was directly proportional to the ATBC content in the blends. The rheology showed that the plasticiser could obviously decrease the shear viscosity and improve the fluidity of the blends. PBA was therefore recognised as a novel plasticiser for enhancing the properties of PLA. In particular, as a biodegradable polymer, PBA, when used as a plasticiser in PLA, can enhance migration resistance for its proper molecular weight. Moreover, the area of application of plasticised PLA is broadened.

Plasticization of poly(lactic acid) through blending with oligomers of lactic acid: Effect of the physical aging on properties

2015 ◽  
Vol 66 ◽  
pp. 533-542 ◽  
Author(s):  
Roberto Avolio ◽  
Rachele Castaldo ◽  
Gennaro Gentile ◽  
Veronica Ambrogi ◽  
Stefano Fiori ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Physical Aging ◽  
Poly Lactic Acid ◽  
Acid Effect
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