Tailoring the Crystallization Behavior and Mechanical Property of Poly(glycolic acid) by Self-nucleation

Li, Jiaxuan; Niu, Deyu; Xu, Ping; Sun, Zhaoyang; Yang, Weijun; Ji, Yang; Ma, Piming

doi:10.1007/s10118-022-2671-y

Cited by 9 publications

(5 citation statements)

References 37 publications

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“…1,2 Poly(glycolic acid) (PGA) is an emerging biocompostable material with promising applications in packaging because of its biocompatibility, chemical resistance, and outstanding barrier properties. 3,4 However, utilization of PGA is greatly restricted by its poor ductility. 5 Conventional polymer toughening strategies are copolymerization and blending.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, many efforts have been attempted to address the environmental and ecosystem impacts caused by the overuse of plastic products. The development and application of eco-friendly polymer materials is one of the promising strategies to tackle the plastic epidemic. , Poly(glycolic acid) (PGA) is an emerging biocompostable material with promising applications in packaging because of its biocompatibility, chemical resistance, and outstanding barrier properties. , However, utilization of PGA is greatly restricted by its poor ductility . Conventional polymer toughening strategies are copolymerization and blending .…”

Section: Introductionmentioning

confidence: 99%

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Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Niu

et al. 2022

Macromolecules

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The application of biocompostable poly(glycolic acid) (PGA) is hindered by the conflict between its strength and ductility. In this work, we address an effective strategy to obtain designable strength and ductility of PGA/poly(butylene adipate-co-terephthalate) (PBAT) films by tuning the drawing temperature. At low temperatures (35–40 °C), the poor chain mobility leads to a predominance of stress-induced amorphous chain orientation rather than relaxation and crystallization, and the drawn films exhibit high tensile strength (145 MPa) with remarkable strain hardening. Then, the chain relaxation becomes pronounced due to the increased chain mobility at a temperature range of 45–50 °C, resulting in a low orientation, low crystallinity, and consequently high ductility (elongation at break of 320%). At the high temperature region (55–60 °C), further enhanced chain mobility facilitates the formation of oriented PGA crystallites, which restrict chain relaxation and provide more strengthened elements. As a result, PGA-based films with excellent strength, stiffness, and ductility (e.g., 103 MPa, 2800 MPa, and 220%, respectively) are achieved. Therefore, this work provides an effective route to tune the mechanical properties of PGA materials, and in principle it should be applicable to other semicrystalline polymeric systems as well.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Niu

et al. 2022

Macromolecules

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“…In summary, with the improvement of chain regularity by molecular design and a suitable processing temperature guided by the memory effect, BD-PESK can not only have the appropriate molecular weight, which can be adapted to the melting and hot-pressing process, but also this processing method transformed the melted BD-PESK from an amorphous to a semicrystalline material resulting in great high-temperature mechanical properties. In addition, apart from an easy way to quantify the efficiency of nucleating agents, the practical application of the memory effect to exploit the nucleation density enhancement is relatively rarely studied and still needs further research and development. ,, This study can be regarded as a preliminary exploration of the memory effect in practical applications and may provide experience for future in-depth memory effect research and the development of crystalline PAESs. In a future study, different processing methods can be considered under the guidance of the memory effect to control the number of nuclei, crystallization rate, crystal morphology, etc.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, apart from an easy way to quantify the efficiency of nucleating agents, the practical application of the memory effect to exploit the nucleation density enhancement is relatively rarely studied and still needs further research and development. 37,54,59 This study can be regarded as a preliminary exploration of the memory effect in practical applications and may provide experience for future indepth memory effect research and the development of crystalline PAESs. In a future study, different processing methods can be considered under the guidance of the memory effect to control the number of nuclei, crystallization rate, crystal morphology, etc.…”

Section: Mechanical Properties Of Bd-peskmentioning

confidence: 97%

Study on the Melt Memory Effect and Melt Recrystallization Behavior of Crystallizable Biphenylene Poly(arylene ether sulfone ketone)

Liu

Shang

et al. 2022

Macromolecules

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Poly(arylene ether sulfone) resins are usually a class of amorphous polymers, which makes them inferior to other semicrystalline aromatic polymers in solvent resistance, chemical stability, and mechanical strength. Herein, a crystallizable poly-(arylene ether sulfone ketone) with a high biphenylene content (BD-PESK) was designed and synthesized. BD-PESK showed excellent thermal stability with a T g of 241 °C and 5% weight loss temperature of 548 °C. Meanwhile, BD-PESK exhibited an obvious melt memory effect at 350−370 °C, but a weak melt memory effect would survive even above its equilibrium melting point due to the high segment rigidity. Under the guidance of this effect, the melt recrystallization of BD-PESK with a maximum crystallinity of 23% can be realized effectively, which made it have excellent solvent resistance similar to the PEEK resin. Semicrystalline BD-PESK showed a high tensile strength up to 86 MPa with a good elongation at break of 23%. Furthermore, due to the combination of high T g and semicrystallinity, BD-PESK could maintain 71% storage modulus at 240 °C and still 1.4% storage modulus at 300 °C, respectively, showing superior heat resistance to most thermoplastic polymers.

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“…Due to the absence of a methyl group, PGA possesses hydrophilic properties and can degrade through hydrolysis. With low solubility, high crystallinity, and strong mechanical strength, PGA can maintain its shape in organic solvents while demonstrating controllable degradation properties [ 153 ]. Although its rapid degradation capability is beneficial for short-term implants, it also limits its application, as degradation within a few weeks can affect the mechanical performance of long-term implants [ 154 , 155 ].…”

Section: Nanofiber Scaffold Technologymentioning

confidence: 99%

Nanofiber Scaffolds as Drug Delivery Systems Promoting Wound Healing

Jiang

Zheng

et al. 2023

Pharmaceutics

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Nanofiber scaffolds have emerged as a revolutionary drug delivery platform for promoting wound healing, due to their unique properties, including high surface area, interconnected porosity, excellent breathability, and moisture absorption, as well as their spatial structure which mimics the extracellular matrix. However, the use of nanofibers to achieve controlled drug loading and release still presents many challenges, with ongoing research still exploring how to load drugs onto nanofiber scaffolds without loss of activity and how to control their release in a specific spatiotemporal manner. This comprehensive study systematically reviews the applications and recent advances related to drug-laden nanofiber scaffolds for skin-wound management. First, we introduce commonly used methods for nanofiber preparation, including electrostatic spinning, sol–gel, molecular self-assembly, thermally induced phase separation, and 3D-printing techniques. Next, we summarize the polymers used in the preparation of nanofibers and drug delivery methods utilizing nanofiber scaffolds. We then review the application of drug-loaded nanofiber scaffolds for wound healing, considering the different stages of wound healing in which the drug acts. Finally, we briefly describe stimulus-responsive drug delivery schemes for nanofiber scaffolds, as well as other exciting drug delivery systems.

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Tailoring the Crystallization Behavior and Mechanical Property of Poly(glycolic acid) by Self-nucleation

Cited by 9 publications

References 37 publications

Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Drawing Temperature-Dependent Mechanical Properties of Poly(glycolic acid)/Poly(butylene adipate-co-terephthalate) Films

Study on the Melt Memory Effect and Melt Recrystallization Behavior of Crystallizable Biphenylene Poly(arylene ether sulfone ketone)

Nanofiber Scaffolds as Drug Delivery Systems Promoting Wound Healing

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