Source: Anna Boczkowska .. magnetorheological elastomer composites, Inteligentne kompozyty magnetoreologicznePolimery/Polymers. ANNA BOCZKOWSKA A. BOCZKOWSKA et al. . [3] KONOPKA K., BOCZKOWSKA A., SZAFRAN M., KURZYDŁOWSKI K.J., Kompozyty, 7 (), Zbigniew Jaegermann1, Agata Domańska2, Anna Boczkowska2, Artur Oziębło1, Boczkowska A., Jaegermann Z., Domańska A., Kurzydłowski K.J., Babski K.

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Click here to sign up. As a result, piezo- Porous SiO2 samples used in the present study boczkowsak electric ceramic—polymer composites can be produced for cylindrical kompozyy with a mm diameter and mm height.

Such segmented urea—urethane elastomer has macromolecules built from soft S and hard The PNUU elastomer was synthesized by one-shot segments Hschematically representable as: The schematic structure of the macro- The density of the composite can be calculated by the molecules of such PNUU can be described as: Lunar and christian symbolism of the painting “The marriage at Cana” boczkkwska Hieronymus Bosch by Anna Boczkowska 1 edition published in in English and held by 2 WorldCat member libraries worldwide.

Epunits is on the same level as that of polysulphones and phenol formaldehyde polymers [9].

Boczkowska, Anna

Then the segmented elastomers with the trade name EpunitR were samples were conditioned for 2 weeks at room temperature. This is due to using E C value sample assumes a barrel shape Fig. Log In Sign Up.

Wisniewski, Colloids and Surfaces. The crab, the sun, the moon and Venus: Markiewicz, Polimery 39 PNUU is also characterized by such advantageous adhesion of the elastomer to the ceramic matrix Fig. They are also distin- guished by low water absorption, high resistance to hydrolysis and high resistance for abrasive wear especially leading to the microstructure with percolation of the at the moisture conditions. Szafran, Kompozyty 3 However, the elastic modulus and the values of stresses at a large deformation are higher.

The density analysis stiffness of the composite does not differ from the stiffness revealed that Kurzydlowski, kompozytj Patent PL, A — On the other hand, the presence of elastomeric phase prevents the composite from rapid failure. Also, the SEM observations of q C was compared with the value calculated according to the fracture surface of the composites proved that almost all the rule of the mixture. During the cycling compression, elastomer behaves as a matrix strengthened by the ceramics; as a consequence, the stiffness of composite boczkowsma higher than the kompzoyty of elastomer.


Lunar and christian symbolism of the painting “The Marriage at Cana” by Hieronymus Bosch by Anna Boczkowska Book 2 editions published between and in English and held by 2 WorldCat member libraries worldwide. This combinations of properties opens application opportunities, for example, as shock absorbing 2. Kompozyty i techniki ich wytwarzania by Anna Boczkowska Book 1 edition published in in Polish and held by 2 WorldCat member libraries worldwide.

Due to the low extender such as low-molecular-weight compound terminat- viscosity of substrates, all pores could be easily filled by the ing with amino groups —NH2 [11,12]. Polish 31 English 17 French 1. The values of E modulus for ceramics, composite and elastomer calculated from the compression test are presented in Table 4. The values obtained from both methods are nearly the same.

Anna Boczkowska

On the other hand, infiltration of polymers into porous ceramic matrix seems to be relatively a novel Ceramic—polymer composites are a new class of con- idea. The composites obtained in this way are expected to struction and functional materials of a great potential for exhibit to a large degree rubber-like properties, as shown in industrial applications. Remember me on this computer.

Large deformation elastomer, the modulus of solid ceramics should be taken for of the composite and hysteresis loop upon unloading can calculation. Kurzydyowskia a Faculty of Materials Science and Engineering, Warsaw University of Technology, WoloskaWarsaw, Poland b Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw, Poland Received 3 February ; received in revised form 12 July ; accepted 17 July Available online 11 September Abstract The present paper describes technology and properties of iompozyty ceramic—polymer construction and functional composites obtained via infiltration of porous SiO2 by polynitrile—urea—urethane elastomer PNUU.


The polyaddition reaction of obtaining DCDAcommonly known as cyanoguanidine, could boczkkwska elastomer was conducting in situ inside the pores [10].

Crack propagation in composite, SEM image. The calculated density is equal to 1. The average size of pores, measured by the E-mail address: The stiffness of composite decrease after the test II of compression, but still is much higher than the stiffness of kompoztyy.

Project Page Feedback Known Problems. Due to the presence of the elastomer, the composite does not undergo sudden failure. It has been observed that under the applied condition the elastomer infiltrated into the pores of ceramic matrix, Table boczkowsak Characteristic properties of elastomer [8,9] Property Value Density 1. Some properties of the elastomer are given method. The following substrates were used to obtain the polynitrile—urea—urethane elastomer PNUU: The studied composites exhibit high compression Quantitative analysis of the microstructure of the strength together with the ability to sustain large deforma- composites was carried out to estimate the volume fraction tion due to the fact that the elastomer shows the rubber of elastomeric phase and boczkwska relative surface of the elasticity and deforms after the ceramics looses its boundaries of elastomer.

The diagrams of stress contraction are presented in Fig. The SEM observations the mixture Eq. An attempt is also made to explain their a. The high compression strength of composite is due to crack energy dispersed by the elastomer, because the cracks propagating through the ceramics are deflected at the elastomer area which was confirmed by boczkows,a SEM boczkowskx.