Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements
Abstract Methacrylic acid‐co‐poly(ethylene glycol methacrylate) (MAA‐co‐PEGMA) copolymers (MPEG‐type polycarboxylate ether (PCE) superplasticizers) are characterized by a comb‐like structure. Although they have been used for years as dispersants in cementitious formulations, their structure–property...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-08-01
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| Series: | Macromolecular Materials and Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/mame.202300032 |
| _version_ | 1827779043484762112 |
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| author | Sara Beldarrain Aitor Barquero Guido Goracci Jorge S. Dolado Jose Ramon Leiza |
| author_facet | Sara Beldarrain Aitor Barquero Guido Goracci Jorge S. Dolado Jose Ramon Leiza |
| author_sort | Sara Beldarrain |
| collection | DOAJ |
| description | Abstract Methacrylic acid‐co‐poly(ethylene glycol methacrylate) (MAA‐co‐PEGMA) copolymers (MPEG‐type polycarboxylate ether (PCE) superplasticizers) are characterized by a comb‐like structure. Although they have been used for years as dispersants in cementitious formulations, their structure–property relationship is still not fully understood. In this work, PCEs with uniform composition and different charge‐density (N) or different side chain lengths (P) are synthesized by free‐radical copolymerization varying the MAA/PEGMA ratios and ethylene oxide units in the PEGMA macromonomers. The effect of these copolymers on the hydration kinetics of an Ordinary Portland Cement (OPC) is analyzed, and it is observed that by increasing the PCE concentration the hydration is delayed. For a given PCE concentration, the delay is longer as the MAA/PEGMA ratio increases or the side chain length of the PEGMA decreases. The hydration delay is proportional to the carboxylate dosage and all PCEs fit in a master curve proving that the microstructure of the PCEs synthesized by free‐radical copolymerization can be correlated with the hydration delay of a commercial OPC. |
| first_indexed | 2024-03-11T14:44:35Z |
| format | Article |
| id | doaj.art-a6ca1d87bcd846c59c7f7b5004d54ef1 |
| institution | Directory Open Access Journal |
| issn | 1438-7492 1439-2054 |
| language | English |
| last_indexed | 2024-03-11T14:44:35Z |
| publishDate | 2023-08-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Macromolecular Materials and Engineering |
| spelling | doaj.art-a6ca1d87bcd846c59c7f7b5004d54ef12023-10-30T13:02:23ZengWiley-VCHMacromolecular Materials and Engineering1438-74921439-20542023-08-013088n/an/a10.1002/mame.202300032Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland CementsSara Beldarrain0Aitor Barquero1Guido Goracci2Jorge S. Dolado3Jose Ramon Leiza4POLYMAT, Kimika Aplikatua Saila, Kimika Falkultatea University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea 72 Donostia‐San Sebastián 20018 SpainPOLYMAT, Kimika Aplikatua Saila, Kimika Falkultatea University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea 72 Donostia‐San Sebastián 20018 SpainCentro de Física de Materiales (CSIC, UPV/EHU) Materials Physics Center (MPC) Paseo Manuel de Lardizabal 5 Donostia‐San Sebastián 20018 SpainCentro de Física de Materiales (CSIC, UPV/EHU) Materials Physics Center (MPC) Paseo Manuel de Lardizabal 5 Donostia‐San Sebastián 20018 SpainPOLYMAT, Kimika Aplikatua Saila, Kimika Falkultatea University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Hiribidea 72 Donostia‐San Sebastián 20018 SpainAbstract Methacrylic acid‐co‐poly(ethylene glycol methacrylate) (MAA‐co‐PEGMA) copolymers (MPEG‐type polycarboxylate ether (PCE) superplasticizers) are characterized by a comb‐like structure. Although they have been used for years as dispersants in cementitious formulations, their structure–property relationship is still not fully understood. In this work, PCEs with uniform composition and different charge‐density (N) or different side chain lengths (P) are synthesized by free‐radical copolymerization varying the MAA/PEGMA ratios and ethylene oxide units in the PEGMA macromonomers. The effect of these copolymers on the hydration kinetics of an Ordinary Portland Cement (OPC) is analyzed, and it is observed that by increasing the PCE concentration the hydration is delayed. For a given PCE concentration, the delay is longer as the MAA/PEGMA ratio increases or the side chain length of the PEGMA decreases. The hydration delay is proportional to the carboxylate dosage and all PCEs fit in a master curve proving that the microstructure of the PCEs synthesized by free‐radical copolymerization can be correlated with the hydration delay of a commercial OPC.https://doi.org/10.1002/mame.202300032free‐radical copolymerization, microstructurehydrationordinary portland cementpolycarboxylate ether |
| spellingShingle | Sara Beldarrain Aitor Barquero Guido Goracci Jorge S. Dolado Jose Ramon Leiza Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements Macromolecular Materials and Engineering free‐radical copolymerization, microstructure hydration ordinary portland cement polycarboxylate ether |
| title | Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements |
| title_full | Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements |
| title_fullStr | Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements |
| title_full_unstemmed | Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements |
| title_short | Rationalizing the Effect of the MAA/PEGMA Ratio of Comb‐Shape Copolymers Synthetized by Aqueous Free‐Radical Copolymerization in the Hydration Kinetics of Ordinary Portland Cements |
| title_sort | rationalizing the effect of the maa pegma ratio of comb shape copolymers synthetized by aqueous free radical copolymerization in the hydration kinetics of ordinary portland cements |
| topic | free‐radical copolymerization, microstructure hydration ordinary portland cement polycarboxylate ether |
| url | https://doi.org/10.1002/mame.202300032 |
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