Solid state NMR study of poly(methyl methacrylate)/polyvinylpyrrolidone blends

Silva, Edemilsom P. da; Tavares, Maria Inês B.

doi:10.1007/s002890050367

Cited by 23 publications

(15 citation statements)

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“…Routine CP-MAS 13 C-NMR and P 1 H were also used. 1 The MAS and CPMAS 13 C-NMR spectra showed wide signals that are common for amorphous materials blends, corroborating the signals observed by solution NMR, which showed split signals due to the microstructure. T 1 H for the carbonyl group was 2.3 ms, a typical value for an amorphous rigid material.…”

Section: Solid-state Nmrsupporting

confidence: 80%

“…The first investigation was done by the evaluation of the influence of the PVP in the PMMA/PVP blend microstructure, and we correlated these data with the molecular mobility of the binary blends in different component proportions. On the basis of a previous NMR investigation of PMMA/PVP done by Silva and Tavares, 1 we started using-solution NMR measurements and continued the investigating with solid-state NMR techniques.…”

Section: Introductionmentioning

confidence: 99%

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Solution and solid‐state NMR investigation of poly(methyl methacrylate)/poly(vinyl pyrrolidone) blends

Diniz

Tavares

2004

J of Applied Polymer Sci

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ABSTRACT:The development of polymer blends has become very important for the polymer industry because these blends have shown to be a successful and versatile alternative way to obtain a new polymer. In this study, binary blends formed by poly(methyl methacrylate) (PMMA) and poly(vinyl pyrrolidone) were prepared by solution casting and evaluated by solution and solid-state NMR. Variations in the microstructure of PMMA were analyzed by 13 C solution NMR. Solid-state NMR promotes responses on physical interaction, homogeneity, and compatibility to use these blends to understand the behavior of the ternary blends. The NMR results led-us to acquire information on the polymer blend microstructure and molecular dynamic behavior. From the NMR solution, it was possible to evaluate the microstructure of both polymer blend components; they were atactic. From the solid state, good compatibility between both polymer components was characterized.

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Section: Solid-state Nmrsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Solution and solid‐state NMR investigation of poly(methyl methacrylate)/poly(vinyl pyrrolidone) blends

Diniz

Tavares

2004

J of Applied Polymer Sci

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“…The micro- of each polymer are. Therefore, if an interaction occurred between the polymers, it was not a strong one, since the shift of the Tg was not significant [44]. Besides this, the Tg of a miscible mixture depends on the composition of each polymer in the mixture, so a higher PVAL content in the mixture causes the Tg value of the microparticles to be more shifted toward the Tg of the pure PVAL.…”

Section: Dsc Measurmentsmentioning

confidence: 99%

Development of Polycaprolactone/Poly(Vinyl Alcohol)/Clay Microparticles by Spray Drying

Monteiro¹,

Rodrigues²,

Miguez³

et al. 2016

MSA

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In this study, nanostructured microparticles was developed with polycaprolactone (PCL), poly(vinyl alcohol) (PVAL) and nanoparticles of the commercial sodium clay NT-25® by using the spray drying technique. The systems obtained were characterized by Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Dynamic Laser Light Scattering (DLS) and Differential Scanning Calorimetry (DSC). The NMR 13 C and FTIR techniques showed that both polymers were present in the microparticles and the DSC analysis revealed a small variation in the glass transition temperature of the PCL. The XRD and SEM analyses showed that the microparticles produced were amorphous and had a concave morphology. The NT-25 nanoload reduced the microparticles' size due to the multiple interactions formed in the hybrid nanocomposite material. Therefore, it was possible to develop microparticles by using biodegradable and biocompatible polymers, with different polarities, allowing the incorporation of hydrophilic and hydrophobic materials and enabling the inclusion of otherwise incompatible materials in the same system.

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“…PVP is hydrophilic, amorphous polymer and commonly used in pharmaceutical industry as a crystallization inhibitor. In addition, PVP is compatible with both PEG [27] and PMMA [28,29]. Therefore, the incorporation of PVP may not increase overall viscosity of the system significantly and can be removed simultaneously along with PEG during water debinding.…”

Section: Discussion and Proposed Solutionsmentioning

confidence: 99%

Suitability of PEG/PMMA-based metal injection moulding feedstock: an experimental study

Hayat

Wen

2015

Int J Adv Manuf Technol

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Due to environment-friendly nature, water-soluble binder systems have received much attention in recent years. Polyethylene glycol (PEG) and polymethyl methacrylate (PMMA) binder system is one such example and has been widely reported in the literature. In this paper, a comprehensive investigation of PEG/PMMA binder system has been carried out. Feedstocks were made using stainless steel 17-4PH powder, and subsequently, conventional and micrometal injection moulding (μMIM) processes were carried out. Differential scanning calorimetry (DSC) and fracture surface analysis of moulded samples were performed for complete evaluation. It was found that despite great potential, there are certain drawbacks associated with this binder system. The main problem is the formation of shrinkage voids during solidification. It is proposed that this binder system is more suitable for μMIM process that has an inherently higher cooling rate.

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Solid state NMR study of poly(methyl methacrylate)/polyvinylpyrrolidone blends

Cited by 23 publications

References 0 publications

Solution and solid‐state NMR investigation of poly(methyl methacrylate)/poly(vinyl pyrrolidone) blends

Solution and solid‐state NMR investigation of poly(methyl methacrylate)/poly(vinyl pyrrolidone) blends

Development of Polycaprolactone/Poly(Vinyl Alcohol)/Clay Microparticles by Spray Drying

Suitability of PEG/PMMA-based metal injection moulding feedstock: an experimental study

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