Thermal Properties of Electrospun Polyesters

Kim, Jong-Sang; Lee, Dai Soo

doi:10.1295/polymj.32.616

Cited by 103 publications

(57 citation statements)

References 10 publications

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“…High surface area [21], 2. Increase in segmental mobility as a result of decreased chain entanglements [13], and 3. Higher molecular orientation and stress within polymer chains [44].…”

Section: Effect Of Electrospinning On the Glass Transition Temperaturmentioning

confidence: 99%

“…Most studies have focused on the effect of electrospinning parameters on electrospun fibre diameter [4][5][6][7] and the development of controlled morphology [8][9][10][11][12]. However, very few have focused on the effect of electrospinning on polymer properties, such as molecular orientation of polymer chains [2], polymer crystallization chain conformation [3] and polymer degradation [3,13].…”

Section: Introductionmentioning

confidence: 99%

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Tailoring Crystallinity of Electrospun Plla Fibres by Control of Electrospinning Parameters

2012

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Poly(L-lactic acid) (PLLA) fibers were fabricated by electrospinning. The effects of various electrospinning process parameters on the thermal properties, especially the crystallinity of the electrospun fibers were investigated. Thermal analysis of the fibers revealed that they exhibited degree of crystallinity ranging from 23% to 46% while that for the as-received granules was approximately 37%, suggesting that the crystallinity of electrospun PLLA fibres can be controlled by optimizing the electrospinning process. This finding is very important because crystallinity affects polymer properties such as degradation, stiffness, yield stress, modulus and tensile strength, solubility, optical and electrical properties which will in turn affect the behavior of these materials when they are utilized in energy, environment, defense and security applications. The results presented in this paper show that the degree of crystallinity of the electrospun fibers decreased with increasing the polymer solution concentration. Furthermore, an optimum electrospinning voltage at which maximum degree of crystallinity can be obtained was observed. At voltages higher or lower than the optimum electrospinning voltage, the degree of crystallinity will decrease or increase, respectively. The effect of the needle tip to collector distance (NTCD) on the degree of crystallinity follows no predictable and consistent pattern.

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“…High surface area [21], 2. Increase in segmental mobility as a result of decreased chain entanglements [13], and 3. Higher molecular orientation and stress within polymer chains [44].…”

Section: Effect Of Electrospinning On the Glass Transition Temperaturmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring Crystallinity of Electrospun Plla Fibres by Control of Electrospinning Parameters

2012

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“…[1][2][3][4][5][6][7][8][9][10][11] The electrospinning process generally involves generating a jet of polymer solution by applying an electric field ; fibers are then formed by solidifying the liquid thread by evaporating the solvent, and they are collected on a grounded target. There is another electrospinning process that does not require a solvent [12][13][14][15]. It is termed meltelectrospinning and involves spinning the polymer in the molten state.…”

Section: Introductionmentioning

confidence: 99%

“…It has, however, a weak point in that the molten polymer tends to degrade during the process. [14] To minimize this thermodegradation, a method for rapidly and uniformly heating the polymer by irradiating the polymer with a CO2 laser beam has been proposed. Ogata et al prepared ultra-fine fibers of poly(ethylene-co-vinyl alcohol), poly (lactide) and poly(ethylene terephthalate) (PET) using this process.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Fine Fibers Produced by Laser-Electrospinning

Takasaki

Nakata

et al. 2008

Sen-i Gakkaishi

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“…[14][15][16] The electro spinning of polyethylene terephthalate (PET), polyethylene naphthalate and their blends in the molten state was carried out by Kim & Lee. 17 Renker and co-workers electrospun polybenzimidazole, 18 styrene-butadienestyrene triblock copolymer 19 and carbon nano fibres. 20 The electro spinning of poly-L-lactide, polycarbonate, polyvinylcarbazole 21 and polyvinylpyrolidone 22 were carried out by Bognitzki and co-workers.…”

Section: Functional Polymers and Blendsmentioning

confidence: 99%

Nano Fibres by Electro spinning: Properties and Applications

Nayak¹,

Padhye²

2017

JTEFT

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Electro spinning is a simple and versatile technique applicable to a wide range of polymers and solvents for the production of materials in nanometer scale. The nano fibrous materials produced by electro spinning process exhibit novel and significantly improved physical, chemical and biological properties. The small fibre diameter and the porous structure of the electrospun surfaces enable them for a wide range of applications such as wound dressing, tissue engineering scaffolds, vascular grafts, filters, membranes and sensors. In this article the principle, setup, materials used and the factors affecting the electro spinning process have been described. Also the properties & applications of electrospun fibres and the limitations & future scope of electro spinning process have been highlighted.

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Thermal Properties of Electrospun Polyesters

Cited by 103 publications

References 10 publications

Tailoring Crystallinity of Electrospun Plla Fibres by Control of Electrospinning Parameters

Tailoring Crystallinity of Electrospun Plla Fibres by Control of Electrospinning Parameters

Ultra-Fine Fibers Produced by Laser-Electrospinning

Nano Fibres by Electro spinning: Properties and Applications

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