Characterization of Polyvinylchloride by Means of Sound Velocity and Longitudinal Modulus Measurements

Koda, Shinobu; Yamashita, Kiyoo; Matsumoto, Katsuyuki; Nomura, Hiroyasu

doi:10.1143/jjap.32.2234

Cited by 15 publications

(9 citation statements)

References 4 publications

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“…The density of virgin PMMA was 1.18 5 g/cm 3 , with accuracy of Ϯ0.5%. The density of PMMA in state B was around 1.18 2 g/cm 3 for all experimental conditions in path (1) and was in agreement with that of virgin PMMA.…”

Section: Ultrasonic Velocity and Density Measurementssupporting

confidence: 77%

“…The specimen was uniaxially stretched with Shimadzu AG-25TE tester in the path (1), and the following two states were studied.…”

Section: Experimental Conditionmentioning

confidence: 99%

“…The ultrasonic velocities of virgin PMMA and PMMA in state B were measured at 5 MHz using the time-to-amplitude converter method. 1 Densities of the specimens were measured using the pycnometer. Experimental errors of density data were Ϯ0.5%.…”

Section: Ultrasonic Velocity and Density Measurementsmentioning

confidence: 99%

“…[1][2][3][4] During the deformation process, these mechanical properties are affected by changes in the molecular orientation and packing state, and ultrasonic propagation in the materials is quite sensitive to their changes. Yap et al 5 studied the acoustic properties of PMMA poly(methyl methacrylate) under uniaxial tensile stress using the Brillouin scattering method and reported the strain dependence of the ultrasonic velocities.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic characteristics of PMMA in the steady stress-strain state investigated by coherent Brillouin scattering method

Sakurai

Matsuoka

Koda

et al. 2000

J. Appl. Polym. Sci.

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ABSTRACT:The acoustic properties of PMMA poly(methyl methacrylate) deformed by tensile stress were investigated by the coherent Brillouin scattering method. The ultrasonic velocities of PMMA in steady stress-strain states were measured in the frequency range of 100 MHz to 1 GHz. The ultrasonic velocities decreased with increasing strain, and the ratio of the decrease increased with increasing strain rate. This result indicates that the crazing residues still remain in the steady stress-strain states, and the amount of the residues depends upon the strain rate. The velocity dispersion was observed around 400 MHz for virgin and deformed PMMA and reproduced with a single relaxation process. The relaxation process is assigned to the ␥-relaxation according to the dispersion map for methyl group relaxation in PMMA. The relaxation frequency and strength were independent of the applied stress and strain. The viscoelastic and plastic deformations have little effect on the ␥-relaxation.

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Section: Ultrasonic Velocity and Density Measurementssupporting

confidence: 77%

“…The specimen was uniaxially stretched with Shimadzu AG-25TE tester in the path (1), and the following two states were studied.…”

Section: Experimental Conditionmentioning

confidence: 99%

Section: Ultrasonic Velocity and Density Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Acoustic characteristics of PMMA in the steady stress-strain state investigated by coherent Brillouin scattering method

Sakurai

Matsuoka

Koda

et al. 2000

J. Appl. Polym. Sci.

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show abstract

“…As the fluid is loaded, its compressibility is determined [9][10]. A variety of more sophisticated methods to determine the dynamic bulk modulus of fluids, elastomers, and dielectric materials have also been created [11][12][13][14][15][16][17][18][19][20][21]. In all of these tests, the fluid and elastomer properties are measured by using a complicated testing apparatus.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric-based fluid bulk modulus and diagnostic sensor

2003

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Accurately knowing the bulk modulus of a fluid is very important in many hydraulic applications. The absolute bulk modulus has a major effect on the position, power delivery, response time and stability of virtually all hydraulic systems. Within this work a novel sensing technique to determine the bulk modulus of a fluid or hydraulic system is proposed. The constitutive equations of a piezoelectric actuator are coupled to a fluidic system that contains entrained air and mechanical compliance. The model can be used to extract the bulk modulus of the fluid system in real time. The results indicate that matching the stiffness of the actuator to the stiffness of the fluidic system is critical in obtaining a high sensitivity to the bulk modulus measurement.

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Acoustic analysis of composite soft materials. I. Characterization of the core and boundary layer from compressibility of core/shell particles dispersed in poly(vinyl chloride)

Koda¹,

Tsutsuno²,

Yamada³

et al. 2001

J of Applied Polymer Sci

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The sound velocity of butyl acrylate rubber particles modified by poly(methyl methacrylate) in poly(vinyl chloride) was measured as a function of particle concentration. A model for estimating the adiabatic compressibility of the particle and the boundary layer was proposed. From the model, the partial specific adiabatic compressibility of the particles and the rubber core were evaluated. The adiabatic compressibility of the rubber core was estimated as 3.82 × 10−10 Pa−1. The adiabatic compressibility of the poly(methyl methacrylate) shell is discussed based on the modified model. The study indicates that the shell, including the boundary layer between butyl rubber and poly(methyl methacrylate), is perturbed by the butyl acrylate molecules and is so soft as to be comparable to the rubber. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 2089–2094, 2001

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Characterization of Polyvinylchloride by Means of Sound Velocity and Longitudinal Modulus Measurements

Cited by 15 publications

References 4 publications

Acoustic characteristics of PMMA in the steady stress-strain state investigated by coherent Brillouin scattering method

Acoustic characteristics of PMMA in the steady stress-strain state investigated by coherent Brillouin scattering method

Piezoelectric-based fluid bulk modulus and diagnostic sensor

Acoustic analysis of composite soft materials. I. Characterization of the core and boundary layer from compressibility of core/shell particles dispersed in poly(vinyl chloride)

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