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Maria Bercea

Institutul de Chimie Macromoleculara Petru Poni, Iasi, Romania

Institution web page: http://icmpp.ro
Personal web page: http://mariabercea.wordpress.com/
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Born: 1961

Interests: rheology of polymers, thermodynamics of polymer solutions, polymer gels

Details:
Researcher at Petru Poni Institute of Macromolecular Chemistry, Iasi, Romania

Selected publications:
• Bercea M., Wolf B. A. . Dependence of solvent quality on the composition of copolymers: Experiment and theory for solutions of P(MMA-ran-t-BMA) in toluene and chloroform. Soft Matter, 11 (3), pp. 615-621, 2015.
• Bercea M., Wolf B. A. . Thermodynamics of copolymer solutions: How the pair of interactions can contribute to the overall effect. The Journal of Physical Chemistry B, 118, pp. 9414-9419, 2014.
• Morariu S., Bercea M., Sacarescu, L. . Tailoring of clay/poly(ethylene oxide) hydrogel by chitosan incorporation, . Industrial & Engineering Chemistry Research, 53 (35), pp. 13690-1369, 2014.
• Brunchi C. E., Morariu S., Bercea M. . Intrinsic Viscosity and conformational parameters of xanthan in aqueous solutions: Salt addition effect. Colloids and Surfaces B: Biointerfaces, 122, pp. 512-519, 2014.
• Spatareanu A., Bercea M., Budtova T., Harabagiu V., Sacarescu L., Coseri S. . Synthesis, characterization and solution behaviour of oxidized pullulan. Carbohydrate Polymers, 111, pp. 63-71, 2014.
• Nita L. E., Chiriac A. P., Bercea M. . Effect of pH and temperature upon self-assembling process between poly(aspartic acid) and Pluronic F127. Colloids and Surfaces B: Biointerfaces , 119, pp. 47-54, 2014.
• Bercea M., Editor. Polymer Materials with Smart Properties. Nova Science Publishers, 2013.
• Bercea M., Morariu S., Rusu D. In-situ gelation of aqueous solutions of entangled poly(vinyl alcohol). Soft Matter, 9, pp. 1244-1253 , 2013.
• Nita L. E., Chiriac A. P., Bercea M., Wolf B. A. Synergistic behavior of poly(aspartic acid) and Pluronic F127 in aqueous solution as studied by viscometry and dynamic light scattering. Colloids and Surfaces B: Biointerfaces, 103, pp. 544-549, 2013.
• Bercea M., Nita L. E., Eckelt J., Wolf B. A. Polyelectrolyte complexes: phase diagram and intrinsic viscosities of the system water/poly(2-vinylpyridinium-Br)/poly(styrene sulfonate-Na). Macromolecular Chemistry and Physics, 213 (23), pp. 2504-2513, 2012.
• Morariu S., Brunchi C. -E., Bercea M. The behaviour of chitosan in solvents with different ionic strength. Industrial& Engineering Chemistry Research, 51(39), pp. 12959-1296, 2012.
• Nita L. E., Chiriac A. P., Bercea M., Neamtu I. The magnetic field effect during preparation of an interpenetrated hybrid polymeric composite. Polymer Composites, 33(10), pp. 1816-1823, 2012.
• Gradinaru L. M., Ciobanu C., Vlad S., Bercea M., Popa M. Synthesis and rheology of thermoreversible polyurethane hydrogels. Central European Journal of Chemistry, 10(6), pp. 1859-1866, 2012.
• Spiridon I., Teaca C. A., Bodirlau R., Bercea M. Behavior of Cellulose Reinforced Cross-Linked Starch Composite Films Made with Tartaric Acid Modified Starch Microparticles. Journal of Polymers and the Environment, 2012.
• Nita L. E., Chiriac A. P., Bercea M., Neamtu I. Evaluation of the Complexation Process Between Poly(Aspartic Acid) and Poly(Ethylene Glycol) Through Dynamic Rheology and Electrokinetic Potential. Journal of Macromolecular Science, Part B: Physics, 51, pp. 1-10, 2012.
• Morariu S., Bercea M. . Effect of Temperature and Aging Time on the Rheological Behavior of Aqueous Poly(ethylene glycol)/Laponite RD Dispersions. The Journal of Physical Chemistry B, 116, pp. 48-154, 2012.
• M. Bercea, M. Nichifor, J. Eckelt, B. A. Wolf. Dextran-based polycations: Thermodynamic interaction with water as compared with unsubstituted dextran. 2. Flory-Huggins interaction parameter. Macromolecular Chemistry and Physics, 212, pp. 1932-1940, 2011.
• Bercea M., Darie R. N., Nita L. E, Morariu S. Temperature responsive gels based on Pluronic F127 and poly(vinyl alcohol). Industrial & Engineering Chemistry Research, 50, pp. 4199-4206, 2011.
• Morariu S., Brunchi C. E., Hulubei C., Bercea M. Influence of temperature on the rheological behavior of polymer mixtures in solution. Industrial & Engineering Chemistry Research, 50, pp. 9451-9455, 2011.
• Morariu S., Brunchi C. E., Cazacu M., Bercea M. The behaviour of poly(dimethylsiloxane-co-diphenylsiloxane)s in good and theta solvents. Journal of Chemical & Engineering Data, 56, pp. 1468-1475, 2011.
• Darie R. N., Bercea M., Kozlowski M., Spiridon I. Evaluation of properties of LDPE/Oak wood composites exposed to artificial ageing. Cellulose Chemistry and Technology, 45 (1), pp. 127-135, 2011.
• Nita L. E., Chiriac A. P., Bercea M., Neamtu I. The temperature influence upon the complexation process between poly(aspartic acid) and poly(ethylene glycol). Industrial & Engineering Chemistry Research, 50(9), pp. 5369-5375, 2011.
• Nita L. E., Chiriac A. P., Bercea M., Neamtu I. Aspects concerning the temperature influence on the polymer/polymer interactions between poly(aspartic acid) and poly (ethylene glycol). Colloid and Surfaces A: Physicochemical and Engineering Aspects, 374, pp. 121-128, 2011.
• Brunchi C. -E., Morariu S., Cazacu M., Bercea M. Influence of the Solvent Quality on the Thermodynamic Behavior of Polymethylphenylsiloxane Solutions. Industrial & Engineering Chemistry Research, 49 (24), pp. 12740-6, 2010.
• Nita L. E., Chiriac A. P., Neamtu I., Bercea M. . Study of a binary interpenetrated polymeric complex by correlation of rheological parameters with zeta potential and conductivity. Colloids and Surfaces B: Biointerfacess, 76, pp. 70-75 , 2010.
• Brunchi C. E., Bercea M., Morariu S. . Hydrodynamic properties of polymer mixtures in solution. J. Chem. Eng. Data, 55 (10), pp. 4399-4405, 2010.
• Bercea M., Morariu S., Brunchi C. E. Rheological Investigation of Thermal Induced Gelation of Poly(acrylonitrile). International Journal of Thermophysics, 30, pp. 1411-1422, 2009.
• Chiriac A. P., Nita L. E., Neamtu I., Bercea M. Contribution to polymer nanoparticles analysis by laser light scattering. Polymer Testing, 28, pp. 886-889, 2009.
• Nita L., Chiriac A., Neamtu I., Bercea M., Pintilie M. An analysis of complexation between poly(aspartic acid) and poly(ethylene glycol). Colloids and Surfaces A: Physicochemical and Engineering Aspects, 348, pp. 254-262, 2009.
• Chiriac A. P., Nita L. E., Neamtu I., Bercea M. Contribution to polymer nanoparticles analysis by laser light scattering. Polymer Testing, 28, pp. 886-889, 2009.
• Maria Bercea, Mihai Bercea. Friction reduction in rolling bearing by using polymer additives. Lubrication Science, 21, pp. 321-330, 2009.
• Neamtu I., Nita L. E., Bercea M., Chiriac A. P. Influence of the Initiation System on the Rheological Behaviour of Chemically Crosslinked Hydrogels. Polimery, 54(11-12), pp. 21-26 , 2009.
• Brunchi C. E., Bercea M, Morariu S. Viscometric and rheological study of polyacrylonitrile. e-Polymers, no. 065, pp. 1-10, 2009.
• Bercea M., Eckelt J., Morariu S., Wolf B. A. . Islands of Immiscibility for Solutions of Compatible Polymers in a Common Solvent: Experiment and Theory. Macromolecules, 42 (10), pp. 3620-3626, 2009.
• Bercea M., Eckelt J., Wolf B. A. Vapor Pressures of Polymer Solutions and the Modeling of Their Composition Dependence. Industrial & Engineering Chemistry Research, 48(9), pp. 4603-4606, 2009.
• Ghimici L., Bercea M., Dragan E. S. . Solution Properties of Some Cationic Polyelectrolytes. Materiale Plastice, 46(1), pp. 26-31, 2009.
• Morariu S., Bercea M. Effect of addition of polymer on the rheology and electrokinetic features of Laponite RD aqueous dispersions. Journal of Chemical Engineering Data, 54, pp. 54-59, 2009.
• Hurduc V., Bercea M., Lungu M., Nor I. Copolymers with Controlled Architectures as Rheological Additives for Alkydic Resin Solutions. Journal of Macromolecular Science, Part B, Physics, 48(2), pp. 379-390, 2009.
• Morariu S., Hulubei C., Bercea M. Rheological investigation of some copolymers of N-(substituted maleimide) with styrene in dimethylsulfoxide. Journal of Macromolecular Science Part B: Physics, 47, pp. 1108-1116 , 2008.
• Brunchi C. E., Bercea M., Morariu S. Studies concerning the behavior of polyacrylonitrile solutions in dimethylformamide at very low concentrations. High Performance Polymers, 20(3), pp. 311-322, 2008.
• Brunchi C. E., Morariu S., Bercea M. . Influence of the temperature of the dynamic behavior of polyacrylonitrile in dimethylformamide. Revue Roumaine de Chimie, 53(1), pp. 35-41, 2008.
• Bercea M., Eckelt J., Wolf B. A. Random Copolymers: Their Solution Thermodynamics as Compared with That of the Corresponding Homopolymers. Industrial & Engineering Chemistry Research, 47, pp. 2434-2441, 2008.
• Bercea M., Morariu S., Brunchi C. -E. Influence of Non-Solvent on the Gelation Phenomenon. Revue Roumaine de Chimie, 53(9), pp. 769-776, 2008.
• Morariu S., Bercea M. . Influence of poly(ethylene oxide) on the aggregation and gelation of Laponite dispersions in water. Revue Roumaine de Chimie, 52(1-2), pp. 147-152, 2007.
• Neamtu, A. P. Chiriac, L. E. Nita, M. Bercea, A. Stoleriu. Investigation of poly(aspartic acid) / vinylic polymer interpolymer complex. Journal of Optoelectronics and Advanced Materials, 9(4), p. 981 –, 2007.
• Neamtu I., A. P. Chiriac, L. E. Nita, M. Bercea. Poly(aspartic acid) in interpolymer complex with biomedical applications. Journal of Optoelectronics and Advanced Materials, 9(11), p. 3459 ̵, 2007.
• Morariu S., Bercea M. . Flow behavior of poly(ethylene oxide)-laponite nanocomposite solutions. Journal of Optoelectronics and Advanced Materials, 9(4), pp. 1005-1009, 2007.
• Nor I., Enea R., Hurduc V., Bercea M. . Rheological Study Of Some Photo-Response Stimuli Azo-Polysiloxanes. Journal of Optoelectronics and Advanced Materials, 9(11), p. 9(11), 363, 2007.
• Nita L. E., Chiriac A., Bercea M., Neamtu I. In Situ Rheological Monitoring The Sol - Gel Transition for Polyacrylamide Gel. Rheologica Acta, 46, pp. 595-600, 2007.
• Bercea M., Wolf B. A. Vitrification of polymer solutions as a function of solvent quality, analyzed via vapor pressures. Journal of Chemical Physics, 124 (17), p. 174902 , 2006.
• Bercea M., Wolf B. A. . Enthalpy and entropy contributions to solvent quality and inversions of heat effects with polymer concentration. Macromolecular Chemistry and Physics, 207, pp. 1661-1673, 2006.
• Bercea M., Rusu D. . The Dynamics of Polymer Chains in Solution. In Ecaterina S. Dragan (ed.), New Trends in Nonionic (Co)Polymers and Hybrids, pp. 79-120. Nova Science Publishers, Inc. , 2006.
• Morariu S., Bercea M. . Gels Based on Poly(ethylene oxide)/Laponite Mixtures. Revue Roumaine de Chimie, 51(5), pp. 433-436, 2006.
• Bercea M., Morariu S. . Interpretation of the Intrinsic Viscosity - Temperature Dependence on the Basis of the Excluded Volume Theories, . Revue Roumaine de Chimie, 51(1), pp. 31-37, 2006.
• Neamtu I., Nita L. E., Chiriac A. P., Bercea M. . Rheological monitoring of in situ poly(acrylamide) gel preparation. Journal of Optoelectronics and Advanced Materials, 8 (1), pp. 201-204, 2006.
• Paleu V., Bercea I., Bercea M. . Lubricant Oils Additived with Polymers in EHD Contacts: Part 2 - Tests on Four-Ball Machine. Lubrication Science, 17 (2), pp. 173-184, 2005.
• Bercea M., Paleu V., Bercea I. Lubricant Oils Additived with Polymers in EHD Contacts: Part 1 - Rheological Behaviour. Lubrication Science, 16 (2), pp. 3-24, 2004.
• Bercea M., Airinei A., Hamciuc V., Ioanid A. Conformation of polysulfone-b-polydimethylsiloxane chains in solution and in solid state. Polymer International, 53(11), pp. 1860-1865, 2004.
• Schneider A., Schuld N., Bercea M., Wolf B. A. On What Terms and Why the Thermodynamic Properties of Polymer Solutions Depend on Chain Length up to the Melt. J. Polym Sci., Part B: Polym. Phys. , 42, p. 1601–, 2004.
• Morariu S., Bercea M. Synthesis, Characterization and Conformational Transitions in Copolymers of 2-(o-chlorophenyl)-4-methylene-1, 3-dioxolane with Vinyl Monomers. Polymer International, 53(9), pp. 1253-1258, 2004.
• Bercea M., Ioan S., Morariu S. Oligo- and Polyacrylonitrile in Dilute Solution. Excluded Volume Effect. Polymer -Plastics Technology and Engineering, 43(2), pp. 477-490, 2004.
• Bercea M., Cazacu M., Wolf B. A. Chain connectivity and conformational variability of polymers: Clues to an adequate thermodynamic description of their solutions I: Dilute solutions. Macromolecular Chemistry and Physics, 204, pp. 1371-1380, 2003.
• Bercea M., Bercea I., Nelias D., Flamand L. Polyethylene as Additive for Mineral Oils. Part II. EHD Traction Behavior. Tribology Transactions, 45 (2), pp. 145-152, 2002.
• Bercea M., Bercea I. A Rheological Model Based on Primary Laboratory Data of the Lubricants Additived with Polymers. Macromolecular Symposia, 181, pp. 353-362, 2002.
• Ioan S., Bercea M. . Second Virial Coefficient of Oligo and Polyacrylonitrile. Polymer Testing, 21(2), pp. 233-239, 2002.
• Bercea M., Simionescu B. C. Rheology of Very High Molecular Weight Poly(Methyl Methacrylate) Solutions. Revue Roumaine de Chimie, 47(1-2), pp. 155-164, 2002.
• Bercea M., Navard P. Shear Dynamics of Aqueous Suspensions of Cellulose Whiskers. Macromolecules, 33, pp. 6011-6016, 2000.
• Ioan C., Bercea M., Vernet J. -L., Simionescu B. C. . Dynamic Behavior of Ultrahigh Molecular Weight Poly(Methyl Methacrylate) in Semidilute Solutions. Macromolecular Symposia, 158, pp. 169-182, 2000.
• Ioan S., Bercea M., Morariu S. Effect of Chain Ends and Chain Stiffness on the Solution Properties of Polyacrylonitrile. Revue Roumaine de Chimie, 45 (7-8), pp. 717-724, 2000.
• Bercea M., Ioan C., Ioan S., Simionescu B. C., Simionescu C. I. Ultrahigh Molecular Weight Polymers in Dilute Solutions . Progress in Polymer Science, 24, pp. 379-424, 1999.
• Bercea M., Bercea I., Nelias D., Olaru N. D. Tribological Behavior of Mineral Oils Additived with Polyethylene. Lubrication Science, 11 (3), pp. 247-270, 1999.
• Bercea M., Bercea I., Nelias D., Olaru N. D. Polyethylene as Additive for Mineral Oils. Part I. Influence of the Polymer Concentration on the Film Forming Properties in Rolling Bearing. Tribology Transactions, 42 (4), pp. 851 - 859, 1999.
• Morariu S., Bercea M., Ioan C., Ioan S., Simionescu B. C. Conformational Characteristics of Oligo- and Polyacrylonitrile. European Polymer Journal, 35 (3), pp. 377-383, 1999.
• Bercea M., Morariu S., Ioan C., Ioan S., Simionescu B. C. Viscometric Study of Extremely Dilute Polyacrylonitrile Solutions. European Polymer Journal, 35 (11), pp. 2019-2024, 1999.
• Bercea M., Gosa K., Simionescu B. C. Conformational Transitions of High Molecular Weight Poly(Methyl Methacrylate) in Dilute Solutions. Polymer Plastics and Technology and Engineering, 38 (1), pp. 87-97, 1999.
• Ioan C., Bercea M., Vernet J. -L., Simionescu B. C. Flow Properties of Ultrahigh Molecular Weight Poly(Methyl Methacrylate) in Semidilute Solutions. Polymer Plastics and Technology and Engineering, 38 (2), pp. 255-266, 1999.
• Bercea M., Bercea I. An Analytical Method to Determine the Rheological Parameters of the Mineral Oils. Revue Roumaine de Chimie, 44, pp. 177-188, 1999.
• Ioan S., Bercea M., Simionescu C. I., Simionescu B. C. Ultrahigh Molecular Weight Polymers. In J. C. Salamone (ed.), Concise Polymeric Materials Encyclopedia, , p. 1582. CRC Press, 1998.
• Bercea M., Ioan C., Morariu S., Ioan S., Simionescu B. C. Solution Properties of Ultrahigh Molecular Weight Polymers. 21. Conformational Characteristics of Poly(Methyl Methacrylate). Polymer Plastics and Technology and Engineering, 37 (3), pp. 285 - 294, 1998.
• Bercea I., Cretu Sp., Bercea M., Olaru D. N. Simulating Roller-Cage Packet Friction in a Tapered Roller Bearing. European Journal of Mechanical and Environmental Engineering, 43 (4), pp. 189-194, 1998.
• Ioan S., Ioan C., Bercea M., Simionescu B. C. Polymolecularity Correction Factors for the Thermodynamic Properties of High Molecular Weight Polyacrylonitrile. Journal of Macromolecular Science - Pure and Applied Chemistry , A35(4), pp. 609-621, 1998.
• Ioan S., Bercea M., Simionescu B. C., Simionescu C. I. . Ultrahigh Molecular Weight Polymers. In J. C. Salamone (ed.), The Polymeric Materials Encyclopedia: Synthesis, Properties and Applications, 11, pp. 8417-8428. Polym. Sci. Techn. Ser. , 1996.
• Ioan S., Bercea M., Ioan C., Simionescu B. C. Solution Properties of Ultrahigh Molecular Weight Polymers. 20. Polymer Chain Dimensions of Poly(Methyl Methacrylate. European Polymer Journal, 31 (1), pp. 85 - 89 , 1995.
• Bercea M., Gosa K., Simionescu B. C. Ultrahigh Molecular Weight Poly(Methyl Methacrylate) Dilute Solutions as Studied by UV Spectophotometry and Viscometry. Revue Roumaine de Chimie, 40 (7-8), pp. 661 - 667, 1995.
• Bercea M., Peiti C., Navard P., Simionescu B. C. Shear Rheology of Semidilute Poly(Methyl Methacrylate) Solutions. Macromolecules, 26, pp. 7095-7096, 1993.
• Simionescu C. I., Ioan S., Bercea M., Mitu N., Simionescu B. C. High Molecular Weight Polystyrene in Solvent Mixtures. Preferential and Total Adsorption. European Polymer Journal, 29(2/3), pp. 183-191, 1993.
• Morariu S., Bercea M., Simionescu B. C. . Polimerizarea radicalica cu deschidere de ciclu. Materiale Plastice, 29 (2), pp. 77-81, 1992.
• Bercea M., Ioan S., Simionescu B. C., Simionescu C. I. . Interpretation of Long Chain Structure from Dilute Solution Properties of Ultrahigh Molecular Weight Polymers. Polymer Bulletin, 27, pp. 571 - 575 , 1992.
• Simionescu B. C., Ioan S., Bercea M., Simionescu C. I. . Unperturbed Dimensions of High Molecular Weight Polyacrylonitrile. European Polymer Journal, 27(7), pp. 589-591, 1991.
• Simionescu B. C., Ioan S., Bercea M., Simionescu C. I. . Solution Characterization of High Molecular Weight Polyacrylonitrile Obtained by Plasma-Induced Polymerization. European Polymer Journal, 27(6), pp. 553-556, 1991.
• Ioan S., Bercea M., Simionescu B. C. . Flexibility Parameter of High Molecular Weight Polymers. 2. Polystyrene in Solvent / Nonsolvent Mixtures. Revue Roumaine de Chimie, 36, pp. 749-755, 1991.
• Ioan S., Bercea M., Simionescu B. C., Simionescu C. I. . Chain Conformation and Viscometric Behaviour of High Molecular Weight Polystyrene in Solvent / Nonsolvent Mixtures. Polymer Bulletin, 26, pp. 117-122, 1991.


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