Swelling of poly(methyl methacrylate) thin films in low molecular weight alcohols

Papanu, J. S.; Hess, Dennis W.; Soane, David S.; Bell, Alexis T.

doi:10.1002/app.1990.070390404

Cited by 62 publications

(53 citation statements)

References 29 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, no swollen layer was seen below a polymer molecular weight of 10 5 g/mol, which again indicated stress cracking. Later, the effect of polymer molecular weight on methanol (MeOH) penetration rates was investigated with monodisperse PMMA (21 -27 8C), and a minimum rate occurred at an intermediate polymer molecular weight [21].…”

Section: Effect Of Polymer Molecular Weight and Polydispersitymentioning

confidence: 99%

“…Acetol caused only swelling, whereas diacetone alcohol dissolved the films at approximately a quarter of the rate of MIBK. Later, the effects of solvent size were also investigated [21]. Penetration rates were strongly dependent on solvent molar volume for methanol, ethanol, and isopropoanol, but 1-butanol and 2-pentanol had rates similar to isopropanol.…”

Section: Effects Of Different Solvents and Additivesmentioning

confidence: 99%

See 1 more Smart Citation

A review of polymer dissolution

Miller-Chou

Koenig

2003

Progress in Polymer Science

881

665

View full text Add to dashboard Cite

Polymer dissolution in solvents is an important area of interest in polymer science and engineering because of its many applications in industry such as microlithography, membrane science, plastics recycling, and drug delivery. Unlike nonpolymeric materials, polymers do not dissolve instantaneously, and the dissolution is controlled by either the disentanglement of the polymer chains or by the diffusion of the chains through a boundary layer adjacent to the polymer-solvent interface. This review provides a general overview of several aspects of the dissolution of amorphous polymers and is divided into four sections which highlight (1) experimentally observed dissolution phenomena and mechanisms reported to this date, (2) solubility behavior of polymers and their solvents, (3) models used to interpret and understand polymer dissolution, and (4) techniques used to characterize the dissolution process. q

show abstract

Section: Effect Of Polymer Molecular Weight and Polydispersitymentioning

confidence: 99%

Section: Effects Of Different Solvents and Additivesmentioning

confidence: 99%

A review of polymer dissolution

Miller-Chou

Koenig

2003

Progress in Polymer Science

881

665

View full text Add to dashboard Cite

show abstract

“…This is in agreement with the higher absorption values of PVBCHAM with respect to PSSAmC16 in 95% ethanol calibration curves given in Figure 4. This burst effect can be explained by the swelling of PMMA polymer matrix in ethanol solutions [24], allowing the biocide polymer to be leached out of the polymer matrix. In the corresponding SERS experiments, shown in Figures 10b and 11b, a similar early release is observed for both PSSAmC16 and PVBCHAM biocide doped PMMA films immersed in 95% ethanol solutions.…”

Section: Immersion Of ~40 Mg Of Pmma Filmsmentioning

confidence: 99%

Evaluation of the release characteristics of covalently attached or electrostatically bound biocidal polymers utilizing SERS and UV-Vis absorption

Mathioudakis¹,

Beobide²,

Koromilas³

et al. 2016

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. In this work, biocidal polymers with antimicrobial quaternized ammonium groups introduced in the polymer biocidal chains either through covalent attachment or electrostatic interaction have been separately incorporated in a poly (methyl methacrylate) polymer matrix. The objective of present study was to highlight the release characteristics of biocidal polymers, primarily in saline but also in water ethanol solutions, utilizing UV-Vis absorption and Surface Enhanced Raman Scattering (SERS). It is shown that through the combination of UV-Vis and SERS techniques, upon the release process, it is possible the discrimination of the polymeric backbone and the electrostatically bound biocidal species. Moreover, it is found that electrostatically bound and covalently attached biocidal species show different SERS patterns. The long term aim is the development of antimicrobial polymeric materials containing both ionically bound and covalently attached quaternary ammonium thus achieving a dual functionality in a single component polymeric design.

show abstract

“…In the absence of any information to the contrary, it is simplest to assume that each dependence is first-order, so thatV Here k is a rate constant that will presumably depend on both the temperature and the extent of damage done to the polymer by the x-ray irradiation. SinceV 1 is a volumetric reaction rate, the corresponding expression forV 2 …”

Section: Model Formulationmentioning

confidence: 99%

“…The most comprehensive model proposed thus far is probably that of Papanu et al 1,2 In their approach, transport in the gel layer is modeled as simple Fickian diffusion. An effective surface concentration at the gel-solvent interface is computed by adding an elastic term to the standard Flory-Huggins expression for the chemical potential, and the movement of this interface is governed by an equation involving the polymer disentanglement rate as estimated from reptation theory.…”

Section: Introductionmentioning

confidence: 99%

A model for reaction-assisted polymer dissolution in LIGA.

Larson

2004

View full text Add to dashboard Cite

A new chemically-oriented mathematical model for the development step of the LIGA process is presented. The key assumption is that the developer can react with the polymeric resist material in order to increase the solubility of the latter, thereby partially overcoming the need to reduce the polymer size. The ease with which this reaction takes place is assumed to be determined by the number of side chain scissions that occur during the x-ray exposure phase of the process. The dynamics of the dissolution process are simulated by solving the reaction-diffusion equations for this three-component, two-phase system, the three species being the unreacted and reacted polymers and the solvent. The mass fluxes are described by the multicomponent diffusion (StefanMaxwell) equations, and the chemical potentials are assumed to be given by the Flory-Huggins theory. Sample calculations are used to determine the dependence of the dissolution rate on key system parameters such as the reaction rate constant, polymer size, solid-phase diffusivity, and Flory-Huggins interaction parameters. A simple photochemistry model is used to relate the reaction rate constant and the polymer size to the absorbed x-ray dose. The resulting formula for the dissolution rate as a function of dose and temperature is fit to an extensive experimental data base in order to evaluate a set of unknown global parameters. The results suggest that reaction-assisted dissolution is very important at low doses and low temperatures, the solubility of the unreacted polymer being too small for it to be dissolved at an appreciable rate. However, at high doses or at higher temperatures, the solubility is such that the reaction is no longer needed, and dissolution can take place via the conventional route. These results provide an explanation for the observed dependences of both the dissolution rate and its activation energy on the absorbed dose.3

show abstract

Swelling of poly(methyl methacrylate) thin films in low molecular weight alcohols

Cited by 62 publications

References 29 publications

A review of polymer dissolution

A review of polymer dissolution

Evaluation of the release characteristics of covalently attached or electrostatically bound biocidal polymers utilizing SERS and UV-Vis absorption

A model for reaction-assisted polymer dissolution in LIGA.

Contact Info

Product

Resources

About