Edward Balizer

Naval Surface Warfare Center

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Bruce Hartmann

Naval Surface Warfare Center

A.S. DeReggi

National Institute of Standards and Technology

Jeffry J. Fedderly

Naval Surface Warfare Center

François M. Guillot

Georgia Institute of Technology

Jacek Jarzynski

University of America

Philipp Kornreich

Syracuse University

Gilbert F. Lee

Naval Surface Warfare Center

Stephen T. Kowel

University of Alabama in Huntsville

F. B. Bateman

Tulane University

Brian Dickens

Los Alamos National Laboratory

Cooperative Institutions

Naval Surface Warfare Center

Massachusetts Institute of Technology

Pennsylvania State University

University of Massachusetts Amherst

University of California, San Diego

National Institute of Standards and Technology

Columbia University

University of Maryland, College Park

Syracuse University

University of California, Los Angeles

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Calculation of temperature and pressure dependence of heat capacities in polymer melts

Journal of Applied Polymer Science (1986)

Bruce Hartmann Edward Balizer

Abstract A new PVT equation of state PV 5 = T 1/2 − ln V where P = P / B 0 , and T = T / T 0 , was used to calculate the temperature and pressure dependence of C p − C ν for polymer melts. The results are in the form of universal master curves in terms of reduced variables. As a function of temperature, a maximum in C p – C ν is predicted, while as a function of pressure a minimum is predicted. Supplementing the PVT equation with experimental C p ( T ) data from the literature, C p / C ν was also found to have a maximum as a function of temperature. Two useful approximations were also found. One is related to the Nernst–Lindemann equation for C p – C ν and the other is the approximate constancy of RT 0 / B 0 V 0 .

Reduced properties

Polymer solution

10.1002/app.1986.070310734

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Citations (1)

Large deformation rate-dependent stress–strain behavior of polyurea and polyurethanes

Polymer (2005)

Jiyang Yi Mary C. Boyce G.F. Lee Edward Balizer

Polyurea

Split Hopkinson Pressure Bar

Compression set

Thermoplastic polyurethane

Thermosetting polymer

10.1016/j.polymer.2005.10.107

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Citations (432)

Studies of electrostriction in phase mixed and phase separated polyurethanes

APS March Meeting Abstracts (1998)

Edward Balizer Yuri M. Shkel François M. Guillot Dan Klingenberg Jacek Jarzynski

Electrostriction

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Investigation of microstructural changes in impacted polyurea coatings using small angle X-ray scattering (SAXS)

Powder Diffraction (2011)

Edward Balizer Jeffry J. Fedderly Gilbert Aaron Lee Susan Bartyczak Willis Mock

Three polyureas with decreasing soft segment molecular weights of 1000, 650, and a 250/1000 blend were molded onto circular steel plates and then impacted with a high speed (275 m/s) conical-shaped steel cylinder. The polyurea layer of the post mortem bilayers was characterized on a molecular level by small angle synchrotron X-ray scattering (SAXS) at the Advanced Photon Source at the Argonne National Laboratory. Analysis revealed that the hard domains of the polyureas with lower molecular weight soft segments reformed and oriented over a greater area of the coating, thus increasing the polymer strain hardening and resulting in visibly less out of plane bilayer deformation. This agrees with the hypothesis that polymer strain hardening is a mechanism that retards necking failure of the metal plate.

Small-angle X-ray scattering

Necking

Polyurea

Strain hardening exponent

Hardening (computing)

Polycarbonate

10.1154/1.3590738

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Polarization and structural transitions of irradiated vinylidene fluoride-trifluoroethylene copolymer

Edward Balizer A.S. DeReggi D. A. Neumann F. B. Bateman

The structure and polarization of the vinylidene fluoride-trifluoroethylene copolymer (50/50 mass ratio), a composition in the range that was first reported to show giant electrostriction after electron irradiation, has been studied by neutron scattering under an electric field. In addition, nonirradiated and irradiated samples were studied by thermal analysis and by the thermal pulse method. Both irradiation-induced melting-point and Curie-point depression and broadening were observed, but no field-induced reversible crystal-crystal conversion was observed in the irradiated specimens.

Electrostriction

10.1109/ceidp.1999.804603

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Citations (1)

X-ray & light scattering studies of polymer compatibility.

R.S. Stein Frank P. Warner ANTONIO ESCALA Edward Balizer T. P. Russell

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Structure Evolution During Ferroelectric Phase Transition in a Vinylidene Fluoride/Trifluoroethylene Copolymer | NIST

Polymeric materials science and engineering (2002)

Z G. Wang Edward Balizer Benjamin S. Hsiao Charles C. Han

NIST

Ferroelectric Polymers

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Photoacoustic Study of Polymer Blends of PVF<inf>2</inf>-TFE and PET/PBT

Edward Balizer Mohamed Talaat J. A. Bucaro

The mechanical and electrical properties of polymer blends are dependent on the crystallinity of each component. The standard methods of characterizing polymer crystallinity are by IR and thermal calorimetry. However, disadvantages arise for both methods. IR requires very thin samples which may alter the crystallinity. For thermal calorimetry, the melting endotherms for each component cannot always be detected. The use of photoacoustic spectroscopy (PAS) is not hindered by the above problems. To this end we use PAS to characterize two blends. One is of the polyesters PET/PBT and the other of different molecular weights of PVF2-TFE copolymers. The polyester blends have been characterized by IR and will be compared to the PAS results to determine quantifying procedures, which are then applied to the PVF2-TFE blends. The effect of blending high and low molecular weight copolymers on the piezoactive B phase crystals is reported.

10.1109/ultsym.1982.197892

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Neutron scattering study of electron-irradiated P(VDF-TrFE)

APS March Meeting Abstracts (2000)

Edward Balizer A.S. DeReggi Dan A. Neumann Fred Bateman

Mott scattering

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Acoustic Properties

Encyclopedia of Polymer Science and Technology (2003)

Jacek Jarzynski Edward Balizer Jeffry J. Fedderly Gilbert Aaron Lee

Abstract This article covers the use of acoustics as a molecular probe of polymer structure and describes various acoustic applications of polymers. Sound speed and sound absorption measurements in polymers are useful both as a probe of the molecular structure of polymers and as a source of engineering design properties. Enough theory and experimental details are given to make the presentation understandable, but the emphasis is on the experimental results for polymers. Most of the presentation is for small‐amplitude waves in solid polymers. References to some specialized topics are given.

Presentation (obstetrics)

Emphasis (telecommunications)

Sound wave

10.1002/0471440264.pst003

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Citations (6)