Dissolution Rates Of Thin Polymer Films Using Laser Interferometry

Rodriguez, Ferdinand; Groele, R. J.; Krasicky, P. D.

doi:10.1117/12.947809

Cited by 16 publications

(15 citation statements)

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“…Polymer dissolution has been investigated using several experimental techniques including gravimetry, laser interferometry,19–22 differential refractometry,23 optical microscopy,24 ellipsometry,25 spin echo NMR,26 magnetic resonance imaging (MRI),27 and Fourier‐transform infrared (FTIR) microscopy 28–34. FTIR microscopy can provide simultaneous insights into both spatial and spectral data (i.e., chemical components) as a function of time, making the dissolution experiment effective and easy to conduct.…”

Section: Introductionmentioning

confidence: 99%

A Novel High Throughput Method to Investigate Polymer Dissolution

Zhang¹,

Mallapragada²,

Narasimhan³

2010

Macromol. Rapid Commun.

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The dissolution behavior of polystyrene (PS) in biodiesel was studied by developing a novel high throughput approach based on Fourier-transform infrared (FTIR) microscopy. A multiwell device for high throughput dissolution testing was fabricated using a photolithographic rapid prototyping method. The dissolution of PS films in each well was tracked by following the characteristic IR band of PS and the effect of PS molecular weight and temperature on the dissolution rate was simultaneously investigated. The results were validated with conventional gravimetric methods. The high throughput method can be extended to evaluate the dissolution profiles of a large number of samples, or to simultaneously investigate the effect of variables such as polydispersity, crystallinity, and mixed solvents.

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Section: Introductionmentioning

confidence: 99%

A Novel High Throughput Method to Investigate Polymer Dissolution

Zhang¹,

Mallapragada²,

Narasimhan³

2010

Macromol. Rapid Commun.

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“…Experimentally, many techniques and sample geometries have been used. 8 Optical microscopyg> lo has proven useful for the study of swelling and dissolution behavior since it allows measurement of the rate of dissolution and observation of the concentration profile in the dissolving surface layer. However, microscopy works best when the dimensions being observed are 10 pm or greater.…”

Section: Introductionmentioning

confidence: 99%

Measuring and modelling the transition layer during the dissolution of glassy polymer films

Krasicky

Groele

Rodriguez

1988

J of Applied Polymer Sci

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SynopsisThe technique of laser interferometry is now used routinely by the microelectronics industry for the measurement of the dissolution rates of thin polymer films. In addition to the rate of dissolution, laser interferometry can also provide quantitative information on the thickness of the transition layer between the dissolving glassy polymer and the liquid solvent. This paper describes how observed patterns of reflected light intensity may be analyzed to calculate the thickness of the transition layer for polymers that dissolve with little or no swelling. The technique requires knowledge of the shape of the concentration profile in the transition layer. However, by assuming various simple model profiles one may obtain a reasonable estimate. Experimental measurements of poly(methy1 methacrylate) (PMMA) films dissolving in methylethyl ketone indicate transition layers of thicknesses 0 to 0.1 pm for PMMA of molecular weights Mu, = 37,000 to 1,400,000.

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“…The development of a polymeric resist by dissolution may be described as a two-step process (1). First, the smaller solvent molecules must diffuse into the polymer matrix.…”

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confidence: 99%

A Criterion for Case II Diffusion in Resist Development by Dissolution

Cole

Lee

1989

J. Electrochem. Soc.

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A criterion for development which proceeds by Case I I diffusion has been derived. The criterion depends only upon material parameters, the easily controlled bulk concentration of solvent, and the penetration depth which may be calculated or specified by the user. By specifying the value of the penetration depth, the user can easily determine conditions under which development proceeds at the desired rate for a system exhibiting this behavior.

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Dissolution Rates Of Thin Polymer Films Using Laser Interferometry

Cited by 16 publications

References 0 publications

A Novel High Throughput Method to Investigate Polymer Dissolution

A Novel High Throughput Method to Investigate Polymer Dissolution

Measuring and modelling the transition layer during the dissolution of glassy polymer films

A Criterion for Case II Diffusion in Resist Development by Dissolution

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