Rheological properties of polyvinylidene fluoride and polymethyl methacrylate engineering alloys

Burke, Dennis Michael

doi:10.1002/vnl.730150312

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…These blends marry the chemical flame resistance, toughness, and piezoelectric nature of PVDF4, 5 with the modulus, tensile strength, low smoke toxicity, and optical properties of PMMA 6. Because of their superior barrier properties, such as the chemical/flame resistance and toughness/flexibility of PVDF,7 along with the hardness, rigidity, low smoke toxicity, and superior transmission/refractive8 properties of PMMA, these blends are of considerable commercial relevance. The characteristics and morphology of PMMA/PVDF blends have been investigated with various techniques such as X‐ray, Fourier transform infrared (FTIR), optical, calorimetric, microscopic, and electrical measurements 9–12.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Pawde

Deshmukh

2009

J of Applied Polymer Sci

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In this investigation, poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) blends (w/w) were prepared in a Brabender (South Hackensack, NJ) plasticorder with a thermoplastic mixing chamber (type W60) preheated at 180 C. These blends were further converted into films by a conventional solution casting method and characterized with Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, mechanical property measurements, impact strength testing, ultraviolet-visible spectroscopy, refractive-index measurements, and contact-angle study. The Fourier transform infrared results indicated that the compatibility between these two systems resulted from hydrogen bonding between the carbonyl group of PMMA and the CH 2 group of PVDF. The thermal analysis showed depressions in the glass-transition temperature, melting temperature, and crystallization temperature. The heat of crystallization increased with an increase in the PVDF content in the blend. An increase in the heat of crystallization meant an increase in the crystallinity. An increase in the cooling rate increased the crystallization rate. The improvement in the mechanical properties of the blend films indicated that the observed behavior was ascribable to a more coherent structure of the blends due to strong specific interactions between PMMA and PVDF chains. The impact strength analysis revealed a substantial increase in the impact strength from 21.64 to 38.52 J/m. Optical absorption spectra suggested the presence of an optical band gap energy that increased with an increase in the PVDF content in the blend. The contact angle against water increased with the PVDF content in the blend film, and this was caused by the hydrophobicity of PVDF due to the CF 2 group of PVDF.

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Section: Introductionmentioning

confidence: 99%

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Pawde

Deshmukh

2009

J of Applied Polymer Sci

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“…By combining the superior barrier properties, chemical/ flame resistance, and toughness/flexibility of poly(vinylidene fluoride) (PVDF) [1][2][3] with the hardness, rigidity, low smoke toxicity, and superior transmission/refractive properties of poly(methyl methacrylate) (PMMA), [4][5][6] PMMA/ PVDF blends are of considerable commercial relevance. Addition of PMMA also serves to improve the processability, [7] as well as the intrinsic piezo-and pyroelectric properties, [8][9][10][11] of PVDF.…”

Section: Introductionmentioning

confidence: 99%

Phase Behavior of Poly(methyl methacrylate)/Poly(vinylidene fluoride) Blends in the Presence of High‐Pressure Carbon Dioxide

Walker

Melnichenko

Wignall

et al. 2003

Macro Chemistry & Physics

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Previous efforts have demonstrated that high‐pressure CO2 can markedly influence the phase behavior of amorphous polymer blends. In this work, we examine the effect of high‐pressure CO2 on the miscibility of blends composed of glassy poly(methyl methacrylate) (PMMA) and semicrystalline poly(vinylidene fluoride) (PVDF). Blends of this type are known to exhibit lower critical solution temperature (LCST) behavior with partial miscibility up to ≈50–60 wt.‐% PVDF at ambient conditions. Two miscible PMMA/PVDF blends have been systematically exposed to high‐pressure CO2 at 35 °C and pressures below and above the critical pressure. Small‐angle X‐ray scattering reveals that the scattering intensity at high scattering angles shows little dependence on pressure at low CO2 pressures, but increases substantially at relatively high CO2 pressures. Transmission electron microscopy and differential scanning calorimetry analyses confirm that the blends are initially quasi‐homogeneous with diffuse PVDF‐rich dispersions and a single glass transition temperature. After exposure to relatively high CO2 pressures, however, the PVDF is found to crystallize within the PMMA‐rich matrix. Thermal recycling of these blends promotes homogenization, indicating that such CO2‐altered phase behavior is reversible.SAXS patterns acquired from the 69/31 w/w PMMA/PVDF blend.magnified imageSAXS patterns acquired from the 69/31 w/w PMMA/PVDF blend.

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Studies on surface properties of polymeric coated paper material

Pawde¹,

Kalim²

2006

J of Applied Polymer Sci

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Surface properties of a polymeric coating system have a strong influence on its performance and service life. However, the surface of a polymer coating may have different chemical, physical, and mechanical properties from the bulk. Significant progress has been made during the last three decades in the improvement of coating on materials. It has been established that polymeric blends have great potential in replacing economically many conventional materials because of their high specific strength. It is needed today, constantly, to improve the surface finish of any material for efficiency and shiny appearance in the severity of working environment. In packaging, materials having longer service lives and those are less corrosive are highly used. The effect of polymer based coating on the paper material improves its mechanical properties and flame resistance. Effect of flame retardant polymer coating illuminates the surface of the sheet. Important application of the material sheets will be for corrosion receptivity and humidity resistance of this material will certainly improve. Blends of PMM/PVDF are mainly used to improve piezoelectric properties of PVDF. In the present study we report the measurement of surface properties of thin layer of polymer blend coated on the cardboard sheet substrate material. Polymer blend solutions of PMMA/PVDF was prepared at 90/10 (w/w) proportions in miscible solvent of toluene and DMF. Thin film was prepared on the surface of cardboard by dipping the cardboard material in the solution. Thickness of the dried polymer coated paper sheet was measured to see uniformity of coating and for different concentrations. Surface properties such as flexibility index, yellowness, and gloss reflectance were also measured. The study on these polymer coated paper will help in improving the surface property of paper as well as its use in packaging.

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Rheological properties of polyvinylidene fluoride and polymethyl methacrylate engineering alloys

Cited by 6 publications

References 2 publications

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Investigation of the structural, thermal, mechanical, and optical properties of poly(methyl methacrylate) and poly(vinylidene fluoride) blends

Phase Behavior of Poly(methyl methacrylate)/Poly(vinylidene fluoride) Blends in the Presence of High‐Pressure Carbon Dioxide

Studies on surface properties of polymeric coated paper material

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