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Georgi Kostov Kotzev


Institute of Mechanics, BAS

Department: Mechanics and Technology of Polymer Composites and Nanocomposites

Phone: +359 2 979 6409



Scientific degrees, institution, year:

Dr, Institute of Metal Science,1987

Fields of Research:

polymer processing, thermoplastic composites and nanocomposites, polymer blends, polymer foams

Extended Information


Recent Publications:

1. Djoumaliisky, M., Kretzschmar, B., Bold R., Kotzev, G. Melt Compounding of PP/Clay Nanocomposites in Vibration Force Field, Austrian-Slovenian Polymer Meeting ASPM’2013, April 3-5, Bled, Slovenia, Proceedings, 278-280.

2. Borovanska, I., Dobreva, T., Benavente, R., Djoumaliisky, S., Kotzev, G. Quality assessment of recycled and modified LDPE/PP blends. Journal of Elastomers and Plastics, volume 44 (6), 2012, 479-497. ISSN: 0095-2443; IF: 0.639

3. Kotzev, G., Djoumaliisky, S., Natova, M., Benavente, R. Vibration-assisted melt compounding of polypropylene/carbon black composites: Processability, filler dispersion and mechanical properties. Journal of Reinforced Plastics and Composites 31 (20), 2012, 1353-1363. ISSN: 0731-6844; IF: 0.902

4. Djoumaliisky, S., Benavente, R., Kotzev, G., Vulchev, V., Krusteva, E., Krastev, R.  Conductive composites based on metallocene isotactic poly(propylene): Preparation and properties.  Macromolecular Symposia 311 (1), 2012, 64-69. ISSN: 1022-1360; SGR: 0.28.

5. Kotzev G., Vulchev V., Djoumaliisky S., Natova M., Krastev R., Electroconductivity and mechanical properties of melt compounded PP/carbon black composites, Nanoscience & Nanotechnology, volume 11, 2011, 217-220, ISSN:1313-8995

6. Kotzev G., Djoumaliisky S., Natova M., Benavente R., Effect of vibrations on melt compounding of PP/carbonic nanocomposites, Abstract book, MACRO 2010, 43rd IUPAC World Polymer Congress, Glasgow, UK, D13_P56.

7. Krusteva E., Djoumaliisky S., Benavente R., Cerrada M. L., Kotzev G., Pérez E., Pereña J. M., Dobreva T., Rheological properties of metallocene based-polypropylene nanocomposites, Nanoscience & Nanotechnology, vol. 10, 193-196, (2010), ISSN:1313-8995.

8. G. Kotzev, S. Djoumaliisky, M. Natova, T. Dobreva, R. Krastev. Mechanical properties and heat resistance of foamed PP/carbon black nanocomposites, Nanoscience & Nanotechnology, vol. 9, 172-175 (2009).

9. G. Kotzev, T. Dobreva, M. Natova, M. Iliev. Structure and morphology of foamed carbon filled polypropylene nanocomposites, Proceedings of 12th International Conference on Mechanics and Technology of Composite Materials, Varna, September 22-24, 2009, 331-335.

10. Djoumaliisky S., Benavente R., CerradaM. L., Kotzev G., Natova M., Pereña J. M., Pérez E., Dobreva T.. Characterization of carbon black filled nanocomposites based on metallocene i-PP, Nanoscience & Nanotechnology, vol. 9, 168-171, (2009) ISSN: 1313-8995.

11. Djoumaliisky S., Kotzev G., Krusteva E., Iliev M., Krasteva M., Preparation and rheological behaviour of PP/carbon black nanocomposites, Nanoscience & Nanotechnology, vol. 8, 101-104, (2008), ISBN: 978-954-322-286-5.

12. Kotzev G., Djoumaliisky S., Krasteva M., Iliev M., Perez E., Cerrada M. L., Effect of Sample Configuration on the Morphology of Foamed LDPE/PP blends Injection Molded by Gas Counterpessure Process, Macromol. Mater. Eng., vol. 292 (6), 769-779, (2007), ISSN 1438- 7492

13. Kotzev G., Djoumaliisky S., Iliev M., Krasteva M., Structure and mechanical properties of polyolefin blends injection-molded by gas-counterpressure process, Proceedings of 11th Int. Conference on Mechanics and Technology of Composite Materials, October 02-04, 2006, Sofia, 235-240, ISSN: 1313-8693.

14. Djoumaliisky S., Kotzev G., Recycling of unsorted polymer wastes by compatibilizing agents, Proceedings of 11th Int. Conference on Mechanics and Technology of Composite Materials, October 02-04, 2006, Sofia, 204-209 ISSN: 1313-8693.

15. Kotzev G., Iliev M., Cerada M. L., Krasteva M., Perez E., Djoumaliisky S., Studies of nano and micro scale structure formed in foamed polyolefin blends injection molded by gas-counterpressure process, Nanoscience & Nanotechnology, vol. 5, 46-50, (2005), ISBN 10: 954-580-205-7. ISBN 13: 978-954-580-205-8.

16. Kotzev G., Some possibilities for modification of foamed polyolefins by crosslinking in the course of injection molding process, Proceedings of 10th International Conference on Mechanics and Technology of Composite Materials, September 15-17, 2003, 311-317.

17. Kotzev G., Studies of mechanical properties and melting behaviour foamed and crosslinked LDPE/PP blends, Cell. Polym., vol. 21, 431-443, (2002).

18. Kotzev G., Djoumaliisky S., Touleshkov N., Investigation of blowing agent systems based on sodium bicarbonate, Journal UCTM, vol. 37, 141-150, (2002).

19. Kotzev G., Touleshkov N., Christova D., Foamed crosslinked LDPE/PP blends made by hot mold injection molding, Macromol. Symp., volume 181, 507-511, (2002).

20. Kotzev G., Touleshkov N., Christova D., Nedkov E., Nonisothermal melting and crystallization of foamed crosslinked polyethylene, J. Cell. Plast., volume 36, 29-44, (2000).

21. Christova D., Touleshkov N., Djoumaliisky S., Kotzev G., Nedkov E., Structure investigation of foamed specimens of LDPE, PP and their blends made by gas-counter pressure injection molding, Proceedings of 9th International Conference on Mechanics and Technology of Composite Materials, September 11-14, 2000, Sofia, 215-220.

22. Kotzev G., Touleshkov N., Djoumaliisky S.,Sodium bicarbonate/organic acid compositions – blowin agent for thermoplastic foam processing, Proceedings of 9th International Conference on Mechanics and Technology of Composite Materials, September 11-14, 2000, Sofia, 288-293.

Recent Projects:

1. Development of technological assembling of energy-efficient pipes intended for outdoor mounting, 2013-2014, member.

2. Recycling of mixed plastic wastes from households, 2010-2014, member.

3. Foamed PP nanocomposites: processing, structural characterization, thermomechanical behavior and application, 2008-2012, coordinator.

4. Processing, structural, mechanical and thermomechanical characterization of injection molded polymers, 2004-2006, coordinator.


Honors: Gold medal, 1975, Technical and scientific creative works of youth.

Gold medal, 1986, 42 International Plovdiv Fair.

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Modified date:12-06-2014