Employing of some hyperbranched polyesteramides as new polymeric admixtures for cement

• Published in: Journal of applied polymer science Vol. 121; no. 1; pp. 309 - 320
• Main Authors: Amin, A., Darweesh, H. H. M., Ramadan, A. M., Morsi, S. M. M., Ayoub, M. M. H.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 05-07-2011; Wiley; Wiley Subscription Services, Inc
• Subjects: Admixtures; Applied sciences; Buildings. Public works; Cements; Compressive strength; Exact sciences and technology; hyperbranched polymers; Infrared radiation; limestone Portland cement; Materials; Materials science; Miscellaneous (including polymer concrete, repair and maintenance products, etc.); Monomers; ordinary Portland cement; Organic polymers; Pastes; Phases; Physicochemistry of polymers; Polyesteramides; polymeric admixtures; Polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Branched polymer; Molecular structure; Polyesteramide; Mechanical properties; polyesteramides; polymeric admixtures; Condensation polymerization; Compressive strength; Experimental study; Portland cement; Thermal stability; hyperbranched polymers; Thermal properties; Morphology; Preparation; Concentration effect; Water content; Adjuvant; limestone Portland cement; ordinary Portland cement
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.33577

Hyperbranched polyesteramides (HBPA1 and HBPA2) were synthesized by the bulk polycondensation of maleic anhydride (MAn) as an A2 monomer with both of diisopropanolamine (DIPA) and diethanolamine (DEA), respectively, as B′B2 monomer. The prepared polymers were analyzed with IR, GPC, 1H NMR, TGA, and DSC. The hyperbranched polyesteramides were applied as polymeric admixtures in two different types of cement, namely ordinary Portland cement (OPC) and Portland limestone cement (PLC). Several parameters were studied to evaluate the action of HBPA1 and HBPA2 polymers as cement admixtures. Adding HBPA1 and HBPA2 decreased the water of consistency and increased the compressive strength with no effect on the chemical composition of the cement phases. The combined water content and bulk density displayed the same trend as compressive strength. The IR spectra of the formed phases for the mixed cement pastes with HBPA1 and HBPA2 illustrated increased intensities of the absorption bands than those of the pristine cement pastes. The SEM photos showed that the incorporation of HBPA1 and HBPA2 in cement phases affected the morphology and microstructure of the formed hydrates. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011