Substituent effect in anionic polymerization of β‐lactones initiated by alkali metal alkoxides

Kurcok, Piotr; Matuszowicz, Andrzej; Jedliński, Zbigniew; Kricheldorf, Hans R.; Dubois, Philippe; Jérôme, Robert

doi:10.1002/marc.1995.030160709

Cited by 23 publications

(13 citation statements)

References 21 publications

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“…The mechanisms of ROP of lactone and lactide by various initiators have been concerned by researchers for a long time. It has been revealed that ring‐opening polymerization of some lactone such as β‐butyrolactone and its derivatives initiated by strong base such as alkali‐metal alkoxide either through acyl‐oxygen bond cleavage or by alkyl‐oxygen bond split 71–73. Recently, Soum and coworkers59 demonstrated that the ring‐opening polymerization of ε‐caprolactone, δ‐valerolactone, and D , L ‐lactide took place through acyl‐oxygen bond cleavage resulting in the polymer chains capped with lanthanum alkoxide groups.…”

Section: Resultsmentioning

confidence: 99%

Ring‐opening polymerization of 1,4‐dioxan‐2‐one initiated by lanthanum isopropoxide in bulk

Zhu

Qiu

et al. 2008

J. Polym. Sci. A Polym. Chem.

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Lanthanum isopropoxide (La(OiPr)3) has been synthesized and employed for ring‐opening polymerization of 1,4‐dioxan‐2‐one in bulk as a single‐component initiator. The influences of reaction conditions such as initiator concentration, reaction time, and reaction temperature on the polymerization were investigated. The kinetics indicated that the polymerization is first‐order with respect to the monomer concentration. The Mechanistic investigations according to 1H NMR spectrum analysis demonstrated that the polymerization of PDO proceeded through a coordination‐insertion mechanism with a rupture of the acyl‐oxygen bond of the monomer rather than the alkyl‐oxygen bond cleavage. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 5214–5222, 2008

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Section: Resultsmentioning

confidence: 99%

Ring‐opening polymerization of 1,4‐dioxan‐2‐one initiated by lanthanum isopropoxide in bulk

Zhu

Qiu

et al. 2008

J. Polym. Sci. A Polym. Chem.

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“…40 The second route of producing PLA is to collect, purify, and ring-open and polymerize lactide to yield high molecular weight (average M w > 100 000) PLA. 40,43,44 The combination of the chiral lactic acid monomers (Fig. 2) or the depolymerization of low molecular weight PLA ( Fig.…”

Section: Poly(lactic Acid) Plasticsmentioning

confidence: 99%

Progress in bio-based plastics and plasticizing modifications

Mekonnen

Mussone

Khalil³

et al. 2013

J. Mater. Chem. A

665

423

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Over the coming few decades bioplastic materials are expected to complement and gradually replace some of the fossil oil based materials. Multidisciplinary research efforts have generated a significant level of technical and commercial success towards these bio-based materials. However, extensive application of these bio-based plastics is still challenged by one or more of their possible inherent limitations, such as poor processability, brittleness, hydrophilicity, poor moisture and gas barrier, inferior compatibility, poor electrical, thermal and physical properties. The incorporation of additives such as plasticizers into the biopolymers is a common practice to improve these inherent limitations. Generally, plasticizers are added to both synthetic and bio-based polymeric materials to impart flexibility, improve toughness, and lower the glass transition temperature. This review introduces the most common bio-based plastics and provides an overview of recent advances in the selection and use of plasticizers, and their effect on the performance of these materials. In addition to plasticizers, we also present a perspective of other emerging techniques of improving the overall performance of bio-based plastics. Although a wide variety of bio-based plastics are under development, this review focuses on plasticizers utilized for the most extensively studied bioplastics including poly(lactic acid), polyhydroxyalkanoates, thermoplastic starch, proteinaceous plastics and cellulose acetates. The ongoing challenge and future potentials of plasticizers for bio-based plastics are also discussed.

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“…The degradation rate of PLA mainly depends on the temperature during hydrolysis, the size, the shape and the isomer ratio of the PLA [13]. Landfill has been recognized as a cheapest and economic way to bury wastes under the soil.…”

Section: Introductionmentioning

confidence: 99%

Improvement on the properties of polylactic acid (PLA) using bamboo charcoal particles

Lau

Wang

et al. 2015

Composites Part B: Engineering

214

104

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Substituent effect in anionic polymerization of β‐lactones initiated by alkali metal alkoxides

Cited by 23 publications

References 21 publications

Ring‐opening polymerization of 1,4‐dioxan‐2‐one initiated by lanthanum isopropoxide in bulk

Ring‐opening polymerization of 1,4‐dioxan‐2‐one initiated by lanthanum isopropoxide in bulk

Progress in bio-based plastics and plasticizing modifications

Improvement on the properties of polylactic acid (PLA) using bamboo charcoal particles

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