Optical properties of solvent-cast polymer films

Machell, J. S.; Greener, J.; Contestable, B. A.

doi:10.1021/ma00203a033

Cited by 46 publications

(42 citation statements)

References 8 publications

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“…As the solvent evaporates, the mobility of molecular chains in the collapsed film becomes more restricted until the conformations are locked in the resulting solid matrix as the system has approached the glass transition. This preferential alignment parallel to the film plane is due to the residual drying stress produced during the blade casting and drying [11,16,18].…”

Section: Drying Of Aqueous Pva Solutionmentioning

confidence: 99%

A real time study on drying and the mechano-optical behavior of polyvinyl alcohol films in solid and swollen state

Wang

Batra

Cakmak

2015

Polymer

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Section: Drying Of Aqueous Pva Solutionmentioning

confidence: 99%

A real time study on drying and the mechano-optical behavior of polyvinyl alcohol films in solid and swollen state

Wang

Batra

Cakmak

2015

Polymer

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“…Wetting of solids by polymer solutions is important in many aspects of polymer processing, including polymer blending, coating of films and production of reinforced polymer composites [1][2][3][4][5][6][7][8][9][10][11][12]. The influence of the surface on the formation of cast polymer films has mostly been investigated for Langmuir-Blodgett films [1][2][3], while the influence of wetting phenomena on complex polymer suspensions has been studied intensively in the paint, ink and coating literature [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The role of the nature of the casting substrate on the properties of membranes prepared via immersion precipitation

Aerts

Genné

Leysen

et al. 2006

Journal of Membrane Science

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“…Wetting of solids by polymer solutions is important in many aspects for polymer processing, including polymer blending, coating of films and production of reinforced polymer composites [1][2][3][4][5][6][7][8][9][10][11][12]. The influence of the surface on the formation of cast polymer films has mostly been investigated for Langmuir-Blodgett films [1][2][3], while the influence of wetting phenomena on polymer complex suspensions has been studied intensively in the paint, ink and coating literature [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…The influence of the surface on the formation of cast polymer films has mostly been investigated for Langmuir-Blodgett films [1][2][3], while the influence of wetting phenomena on polymer complex suspensions has been studied intensively in the paint, ink and coating literature [4][5][6]. The influence of wettability on phase separation of polymer blends [7][8][9][10] and co-polymers [11,12] has also been intensively studied. In membrane technology, wetting plays an important role in the preparation of flat-sheet membranes via phase inversion, more in specific during the casting of the membrane dope solution on a solid surface.…”

Section: Introductionmentioning

confidence: 99%

Casting Membrane of Acrylamide/Polymethacrylic acid and Reinforced by PAC for Application in Fuel Cell Unit

EE¹,

MM²

2012

J Membra Sci Technol

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that mechanical degradation of the membranes under operational conditions is one of the major reasons for the performance degradation of phosphoric acid-doped polymer fuel cells [22,23]. Optimization of casting solvent is very important for membrane fabrication as it affects the consequent separation performance. Macro-phase separation can be observed for blended membranes cast from polymer/solvent solution, and asymmetric membranes are prepared by phase separation methods [24]. Different solvent pairs result in different membrane morphology and performance. For symmetric (dense) membrane also, fabrication conditions can markedly affect permeation properties [25]. The membrane behavior of a given polymer strongly depends on both the intrinsic material properties and the membrane fabrication conditions. Moreover, practical applications, it is essential to understand the consequences of membrane fabrication conditions, e.g. the effect of solvent selection on the physical structure of the membranes must be carried out. Under the program of the New Energy and Industrial Technology Development Organization, Sanyo Electric Corp., Toshiba Fuel Cell Power System Corp., Matsushita Electric Industrial Corp., Ebara Ballard Corp. and Aishin Seiki Corp. have been examining the possibility of commercializing a 1kW-class PEMFC residential system based on polymer membranes that operates in the temperature region 70-80°C. Such low-temperature operation is an advantage of this type of fuel cell, but it also causes some problems, including low electrical efficiency [26,27] and CO poisoning of the platinum catalyst [28,29]. Furthermore, polymer electrolytes only exhibit high proton conductivities at high humidities. High-temperature PEMFCs (HT- AbstractGamma irradiation poses very important role for casting the polymer membranes. Acrylamide was hydrolyzed by phosphoric acid, while it plays a potential role for coordination of poly methacrylic acid and hydrolyzed acrylamide (acrylic acid) around them. Adding PAC in different ratios for membrane reinforcement besides adsorbing excess of hydrogen proton in aqueous media which enhances proton conductivity. Thermal characterization of the membranes was carried out using thermal gravimetric analysis, while their mechanical properties were investigated by measuring hardness and Chemical description was discussed by studying FTIR and ion exchange capacity (IEC). Morphological characteristics were performed by scan electron microscope. Crystallinity was reviewed using X-ray diffraction which attempts the homogeny of the casted membrane. Electrical resistivity of the membrane was measured resulted in 7 ohm/cm while it reduced to 2.7 ohm by temperature rising to 80°C which confirmed the availability of the membrane in fuel cell usage.

show abstract

Optical properties of solvent-cast polymer films

Cited by 46 publications

References 8 publications

A real time study on drying and the mechano-optical behavior of polyvinyl alcohol films in solid and swollen state

A real time study on drying and the mechano-optical behavior of polyvinyl alcohol films in solid and swollen state

The role of the nature of the casting substrate on the properties of membranes prepared via immersion precipitation

Casting Membrane of Acrylamide/Polymethacrylic acid and Reinforced by PAC for Application in Fuel Cell Unit

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