Fluorescence anisotropy sensor and its application to polymer processing and characterization

Bur, Anthony J.; Roth, Steven C.; Thomas, Charles L.

doi:10.1063/1.1150499

Cited by 31 publications

(12 citation statements)

References 43 publications

(68 reference statements)

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“…It has been used in the investigation of biological structures with self-alignment processes like membranes, rotational diffusion of compounds, cell activity, Langmuir-Bloget films, liquid/liquid interfaces 14 , polymer melts 15 , sol-gel matrices 16 , gas flows, etc.…”

Section: Introductionmentioning

confidence: 99%

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Quintella¹,

Gonçalves²,

Pepe³

et al. 2001

J. Braz. Chem. Soc.

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Este trabalho estuda o fluxo de etileno glicol (MEG) sobre duas superfícies sólidas com constituições químicas diferentes: borossilicato e dióxido de estanho (SnO 2 ). O alinhamento intermolecular, determinado como polarização e anisotropia, mostrou dependência da natureza química do sólido. A razão entre as tensões interfaciais dinâmicas foi 1.09 ± 0.07, devendo ser maior para MEG/borossilicato do que para MEG/SnO 2 . A razão da capilaridade foi 0.92 ± 0.06, sendo menor para MEG/borossilicato. Medidas estáticas do ângulo de contato mostraram valores menores para borossilicato do que para SnO 2 . Os mapas de polarização e anisotropia apresentaram valores mais altos para MEG/SnO 2 , o que pode ser explicado pela alta tensão interfacial do MEG/borossilicato. Estes resultados são compatíveis com interações de volume mais fortes em MEG/SnO 2 e com contribuições de superfície mais fortes em MEG/borossilicato. Isto pode ser atribuído ao borossilicato ser mais eletronegativo, favorecendo mais as pontes de hidrogênio com o MEG.This work studied ethylene glycol (MEG) flowing on two different solid surfaces, borosilicate and thin dioxide (SnO 2 ). Intermolecular alignment, determined as polarization and anisotropy, showed dependence on the solid chemical nature. The ratio between dynamic surface tensions was found 1.09 ± 0.07, being stronger for MEG/borosilicate than for MEG/SnO 2 . The capillary ratio found was 0.92 ± 0.06, being smaller for MEG/borosilicate. Static contact angle measurements gave lower values for borosilicate than for SnO 2 . Both polarization and anisotropy maps presented higher values for MEG/SnO 2 , which can be explained by MEG/borosilicate higher interfacial interaction. The results obtained are compatible with stronger bulk phenomena for MEG/SnO 2 and with stronger interfacial phenomena for MEG/borosilicate. This may be due to borosilicate being more electronegative, yielding more efficiently hydrogen bonds with MEG.

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Section: Introductionmentioning

confidence: 99%

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Quintella¹,

Gonçalves²,

Pepe³

et al. 2001

J. Braz. Chem. Soc.

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“…[117] These formulation advances often affect the large-scale cooperative movement of polymer chain segments and thus the glass transition temperature T g . Several sensor technologies were demonstrated for determining thermodynamic transitions of materials including acoustic-wave, [109] ultrasonic, [118] microcalorimetric, [119] fluorescence sensors, [120] and micro-hotplates. [121] These sensors can be easily applied for combinatorial screening.…”

Section: Viscoelastic Propertiesmentioning

confidence: 99%

Sensors in Combinatorial Polymer Research

Potyrailo

2003

Macromol. Rapid Commun.

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Summary: This review highlights the broad potential of sensor technologies for combinatorial polymer research. Advances in components microfabrication, electronics, transducers, and data analysis in the area of sensors can stimulate the development of many more new concepts applicable for rapid polymer screening. These advances are already impacting on several phases in a typical combinatorial discovery cycle that include parallel synthesis of polymers, their performance testing, evaluation of properties, and processing of collected data. It is demonstrated that sensors provide an attractive addition to the infrastructure of the analytical instruments used for screening of intrinsic and performance polymer properties.Impact of sensor technologies on the combinatorial discovery cycle.magnified imageImpact of sensor technologies on the combinatorial discovery cycle.

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“…Data has also been published from the application of Raman spectroscopy (Deshpande et al, 1998;Slater et al, 2001), UV-visible spectroscopy (Miller and Foulk, 1993) and fluorescence spectroscopy (Bur et al, 2000(Bur et al, , 2002 for analysis of a wide range of processing parameters. Research conducted in the IRC at Bradford has exploited the application of Raman, transmission FT-NIR and fluorescence spectroscopy for in-line measurement of a variety of melt characteristics during extrusion (Barnes, 2004;Barnes et al, 2005b, c;Coates et al, 2003).…”

Section: Introductionmentioning

confidence: 96%

Process monitoring of polymer melts using in-line spectroscopy

Barnes

Sibley

Edwards

et al. 2007

Transactions of the Institute of Measurement and Control

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Over the last decade, there has been an increased drive in the polymer industry toward the development of in-line monitoring techniques for analysis of melt processing. Manufacture of high material volumes combined with stringent quality-control restrictions and the requirement for tailored end-user products, have made the implementation of analytical methods essential for measurement of material characteristics. This paper presents the application of a range of spectroscopic techniques for in-line analysis of polymer extrusion processes. Fourier transform near-infrared (FT-NIR), Raman and fluorescence spectroscopy have been successfully implemented as tools to monitor a range of processing characteristics including copolymer melt and additive composition, material residence time distribution and degree of polymerization. In combination with partial least squares (PLS) chemometric analysis, these spectroscopic techniques are demonstrated to be sensitive and robust tools for monitoring a wide range of chemical and physical parameters at high-temperature and pressure in a polymerprocessing environment.

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Fluorescence anisotropy sensor and its application to polymer processing and characterization

Cited by 31 publications

References 43 publications

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Sensors in Combinatorial Polymer Research

Process monitoring of polymer melts using in-line spectroscopy

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