Synthesis of Biodegradable Polymers: A Review on the Use of Schiff-Base Metal Complexes as Catalysts for the Ring Opening Polymerization (ROP) of Cyclic Esters

Santoro, Orlando; Zhang, Xin; Redshaw, Carl

doi:10.3390/catal10070800

Cited by 93 publications

(58 citation statements)

References 149 publications

(218 reference statements)

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“…However, white pollution caused by improper handling of conventional polymer is increasingly serious. By contrast, biodegradable polymers (BPs), owing to its harmless properties, provide many advantages for environmental protection, so the interest in using BPs instead of conventional polymer is increasing greatly 1–3 . BPs can be divided into two categories: natural polymers and synthetic polymers.…”

Section: Introductionmentioning

confidence: 99%

Biodegradable blends of poly(butylene adipate‐co‐terephthalate) and polyglycolic acid with enhanced mechanical, rheological and barrier performances

Shen

Wang

et al. 2021

J of Applied Polymer Sci

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Blends of poly(butylene adipate‐co‐terephthalate)/polyglycolic acid (PBAT/PGA) were prepared by melt blending, in which PGA was used as reinforcing component. Impacts of PGA content on tensile property, microstructure, crystallization property, melt viscosity, barrier performance of the blends were researched. Compared with very soft behavior of PBAT, the tensile yield strength and modulus of PBAT/PGA (65/35) sample increased from 7.67, 62.6 MPa of neat PBAT to 12.05, 158.9 MPa, respectively. However, owing to poor PBAT/PGA interface compatibility, its elongation at break decreased significantly from 1082.1% to 88.7%. An epoxy chain extender (ADR) was used as reactive modifier to improve its interface compatibility and rheological property. The related physical properties of PBAT/PGA/ADR (65/35/x) samples with various ADR contents were evaluated in detail. It was found that ADR exerted relatively complex influences on the properties. Overall, compared with neat PBAT and PBAT/PGA (65/35) sample, the PBAT/PGA/ADR (65/35/x) samples exhibited better stiffness‐ductility balance and higher processing stability.

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Section: Introductionmentioning

confidence: 99%

Biodegradable blends of poly(butylene adipate‐co‐terephthalate) and polyglycolic acid with enhanced mechanical, rheological and barrier performances

Shen

Wang

et al. 2021

J of Applied Polymer Sci

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“…Biodegradable polyester materials have gained increasing attention for their potential applications in the biomedical field [1]. Among them, polyester materials synthesized from ring-opening polymerization (ROP) of cyclic ester monomers [2] are widely used in surgical sutures [3], drug delivery carriers [4], bone fixation [5], and tissue engineering scaffolds [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Poly(l-lactide-co-ε-caprolactone) Copolymer: Structure, Toughness, and Elasticity

et al. 2021

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Biodegradable and bioabsorbable polymers have drawn considerable attention because of their mechanical properties that mimic human soft tissue. Poly(l-lactide-co-ε-caprolactone) (PLCL), the copolymer of L-lactic (LA) and ε-caprolactone (CL), has been applied in many tissue engineering and regenerative medicine fields. However, both the synthesis of PLCL and the structure-activity relationship of the copolymer need to be further investigated to allow tuning of different mechanical properties. The synthesis conditions of PLCL were optimized to increase the yield and improve the copolymer properties. The synthetic process was evaluated by while varying the molar ratio of the monomers and polymerization time. The mechanical properties of the copolymer were investigated from the macroscopic and microscopic perspectives. Changes in the polymerization time and feed ratio resulted in the difference in the LA and CL content, which, in turn, caused the PLCL to exhibit different properties. The PLCL obtained with a feed ratio of 1:1 (LA:CL) and a polymerization time of 30 h has the best toughness and elasticity. The developed PLCL may have applications in dynamic mechanical environment, such as vascular tissue engineering.

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“…APC, however, often display poor chemical and mechanical properties compared to aromatic polycarbonates, and the incorporation of epoxides with various structural features does not always result in an improvement in the final properties of APC [7][8][9]. Aliphatic polyesters are another important class of biopolymers that can be conveniently obtained by the ring-opening polymerization (ROP) of cyclic esters [10][11][12][13] or by the ROCOP of epoxides with cyclic anhydrides [14][15][16][17]. Transition metal complexes generally catalyze all these polymerization processes through a coordination-insertion mechanism.…”

Section: Introductionmentioning

confidence: 99%

Terpolymerization of CO2 with Epoxides and Cyclic Organic Anhydrides or Cyclic Esters

Lamparelli

Capacchione

2021

Catalysts

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The synthesis of polymeric materials starting from CO2 as a feedstock is an active task of research. In particular, the copolymerization of CO2 with epoxides via ring-opening copolymerization (ROCOP) offers a simple, efficient route to synthesize aliphatic polycarbonates (APC). In many cases, APC display poor physical and chemical properties, limiting their range of application. The terpolymerization of CO2 with epoxides and organic anhydrides or cyclic esters offers the possibility, combining the ROCOP with ring-opening polymerization (ROP), to access a wide range of materials containing polycarbonate and polyester segments along the polymer chain, showing enhanced properties with respect to the simple APC. This review will cover the last advancements in the field, evidencing the crucial role of the catalytic system in determining the microstructural features of the final polymer.

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Synthesis of Biodegradable Polymers: A Review on the Use of Schiff-Base Metal Complexes as Catalysts for the Ring Opening Polymerization (ROP) of Cyclic Esters

Cited by 93 publications

References 149 publications

Biodegradable blends of poly(butylene adipate‐co‐terephthalate) and polyglycolic acid with enhanced mechanical, rheological and barrier performances

Biodegradable blends of poly(butylene adipate‐co‐terephthalate) and polyglycolic acid with enhanced mechanical, rheological and barrier performances

Synthesis of Poly(l-lactide-co-ε-caprolactone) Copolymer: Structure, Toughness, and Elasticity

Terpolymerization of CO2 with Epoxides and Cyclic Organic Anhydrides or Cyclic Esters

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