Metal polymers based on �D-5 epoxy-diane resin and colloidal lead

Natanson, É. M.; Khimchenko, Yu. I.; Ulberg, Z. R.; Shvets, T. M.

doi:10.1007/bf00775863

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…In works [27][28][29] it is shown that rubbers which do not possess functional or other active groups do not enter into direct interaction with the surface of metal particles. The formation of a metal organosol for such systems is only observed in the presence of fatty acids.…”

Section: Interaction Mechanism Between Elastomers and Ultra-disperse mentioning

confidence: 99%

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Use of Highly-Disperse Metal Particles in Elastomer Composites

Петрюк

Михайлюк

Новаков

et al. 2011

International Polymer Science and Technology

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Polymer materials filled with metal powders are widely used in a variety of industries because of their specific and often unique properties. The choice of metal filler is governed by the functional purpose of the composite material and by economic or aesthetic considerations. The reason for the extensive use of metal powders as fillers for polymers is most commonly the potential they provide to adjust the density of the materials, their appearance and their magnetic and other physical properties [1-3]. In a polymer, metal powders play the part not only of fillers, but also of crosslinking agents, curing additives, etc. The smaller the metal particles, the larger the specific surface of the powder and the greater its physical and chemical activity. Metals with a colloidal degree of dispersion are especially active. When macromolecules interact with colloidal metals produced in a polymer solution, highly homogeneous two-phase aggregatively stable metal-matrix polymer materials are formed, which are known as metal/polymer colloidal composites. Metal/polymer colloidal composites may find viable use as anti-friction, semiconductor, anti-corrosion, ferromagnetic, catalytically-active and other materials [1]. Various matrix polymers are used as a basis for the production of metal/polymer composites [4-7], the majority of which are sundry thermoplastics [1, 8-21] and thermosetting plastics [16, 22-23]. Elastomers are far less commonly used.

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Section: Interaction Mechanism Between Elastomers and Ultra-disperse mentioning

confidence: 99%

“…This is borne out by the formation of a metal/rubber gel in systems based on natural rubber filled with colloid particles of iron, nickel and cobalt [27][28][29].…”

Section: Interaction Mechanism Between Elastomers and Ultra-disperse mentioning

confidence: 99%

Use of Highly-Disperse Metal Particles in Elastomer Composites

Петрюк

Михайлюк

Новаков

et al. 2011

International Polymer Science and Technology

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“…Disregarding the strain of the polymer volume, since the microhardness is measured in short-duration tests and characterizes, mainly in the first stage, the strain resistance, it is represented in the form of the maximum intemal pressure [11]: E nv = n -Vh" (5) Then, with account for expressions (4) and (5), the volume of the microvoids per mole of the substance is determined as Via = .…”

Section: ---E--= 4--~mentioning

confidence: 99%

“…Spontaneous cooling during formation of blocks was effected at the corresponding pressure up to T < Tgl. The glass transition temperature (Tgl of the original PVC was 354 K, and the yield temperature (Ty) was 456 K.The density (p) of the PVC systems was studied using the method of hydrostatic weighing [5], and the hardness (Hv) was studied, using the Vickers method, on a PMT-3 microhardness meter with loading for a time of 2 min [6]. With a confidence coefficient of 0.95, the mean relative measurement error for p and Hv, respectively, was 0.2 and 1.3%.…”

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Effect of increased compacting pressures on the physicomechanical characteristics of metal-filled polyvinyl chloride

Mukha

Kolupaev

Mukha

2000

J Eng Phys Thermophys

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Based on the principles of linear thermodynamics, molecular physics, and spatial organization of amorphous polymers, the energy of formation of microdefects and the increments in their volumes as functions of the compacting pressure and the content of the filler of polyvinyl chloride systems are calculated.Among promising methods of modifying the physicomechanical properties of polymers is their doping with highly disperse additions and directional control of the technological processes of producing composite materials [1]. Here the question of studying the effect of the T-p compaction mode on their properties remains virtually open [2,3].As the subject of inquiry, we selected industrial polyvinyl chloride (PVC) of the S-65 grade with a molecular weight of 1.4-105 that was produced by suspension polymerization and was purified by reprecipitation from soluton. Cyclohexane of "KhCh" grade (Tboil = 425.5 K, n 29°r = 0.9466) was chosen as the solvent. For more intense dissolution of PVC in cyclohexane, a prepared 3% solution was heated on a water bath with a reflux cooler at a temperature of 310 K. PVC was reprecipitated from the obtained solution with methanol (Tboil = 335 K, n 29°K = 0.7925). The precipitated polymer was washed repeatedly on a filter with methanol and dried in air and then in vacuum at a temperature of 320 K to a constant weight in 10 h. The reprecipitated PVC was a homogeneous powder of white color that was subsequently used for producing composites. As the filler, a highly disperse iron (Fe) powder that was reduced with hydrogen was selected, with a predominant particle size of 15 pro.The specimens were prepared in the T-p mode, which differs from the p-T mode [4] in that the polyvinyl chloride was placed in a mold, which was heated to a temperature of 460 K, and only afterward was a required pressure of 10, 60, 120, 200, and 300 MPa applied, maintaining the temperature mode for another 7 min. Spontaneous cooling during formation of blocks was effected at the corresponding pressure up to T < Tgl. The glass transition temperature (Tgl of the original PVC was 354 K, and the yield temperature (Ty) was 456 K.The density (p) of the PVC systems was studied using the method of hydrostatic weighing [5], and the hardness (Hv) was studied, using the Vickers method, on a PMT-3 microhardness meter with loading for a time of 2 min [6]. With a confidence coefficient of 0.95, the mean relative measurement error for p and Hv, respectively, was 0.2 and 1.3%. Table 1 presents experimental data on the physicomechanical properties of the PVC systems. It follows from the data presented that the density of the original polymer increases_ with the pressure over the entire range considered. However, the density of the PVC compositions increases only at pressures up to 200 MPa. A further increase in it leads to a decrease in the density adequate for the filling (see Table 1).The rise in the density of the PVC systems in the range of 10-200 MPa is caused by "healing" of defects of the material, i.e., a reduction in its fr...

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Adhesive strength and protective capability of composite polymer coatings

Goldade

1982

Mech Compos Mater

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Metal polymers based on �D-5 epoxy-diane resin and colloidal lead

Cited by 5 publications

References 3 publications

Use of Highly-Disperse Metal Particles in Elastomer Composites

Use of Highly-Disperse Metal Particles in Elastomer Composites

Effect of increased compacting pressures on the physicomechanical characteristics of metal-filled polyvinyl chloride

Adhesive strength and protective capability of composite polymer coatings

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