A new method for the quantification of adsorbed styrene acrylate copolymer particles on cementitious surfaces: a critical comparative study

  • The amount of adsorbed styrene acrylate copolymer (SA) particles on cementitious surfaces at the early stage of hydration was quantitatively determined using three different methodological approaches: the depletion method, the visible spectrophotometry (VIS) and the thermo-gravimetry coupled with mass spectrometry (TG–MS). Considering the advantages and disadvantages of each method, including theThe amount of adsorbed styrene acrylate copolymer (SA) particles on cementitious surfaces at the early stage of hydration was quantitatively determined using three different methodological approaches: the depletion method, the visible spectrophotometry (VIS) and the thermo-gravimetry coupled with mass spectrometry (TG–MS). Considering the advantages and disadvantages of each method, including the respectively required sample preparation, the results for four polymer-modified cement pastes, varying in polymer content and cement fineness, were evaluated. To some extent, significant discrepancies in the adsorption degrees were observed. There is a tendency that significantly lower amounts of adsorbed polymers were identified using TG-MS compared to values determined with the depletion method. Spectrophotometrically generated values were ​​lying in between these extremes. This tendency was found for three of the four cement pastes examined and is originated in sample preparation and methodical limitations. The main influencing factor is the falsification of the polymer concentration in the liquid phase during centrifugation. Interactions in the interface between sediment and supernatant are the cause. The newly developed method, using TG–MS for the quantification of SA particles, proved to be suitable for dealing with these revealed issues. Here, instead of the fluid phase, the sediment is examined with regard to the polymer content, on which the influence of centrifugation is considerably lower.show moreshow less

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Metadaten
Document Type:Article
Author:Dr.-Ing. Ulrike SchirmerORCiDGND, Prof. Dr.-Ing. Andrea OsburgGND
DOI (Cite-Link):https://doi.org/10.1007/s42452-020-03825-5Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20210804-44729Cite-Link
URL:https://link.springer.com/article/10.1007/s42452-020-03825-5
Parent Title (English):SN Applied Sciences
Publisher:Springer
Place of publication:Heidelberg
Language:English
Date of Publication (online):2021/08/02
Date of first Publication:2020/11/23
Release Date:2021/08/04
Publishing Institution:Bauhaus-Universität Weimar
Institutes and partner institutions:Fakultät Bauingenieurwesen / Professur Bauchemie und Polymere Werkstoffe
Volume:2020
Issue:Volume 2, article 2061
Pagenumber:11
First Page:1
Last Page:11
Tag:cement; depletion method; mass spectrometry; polymer adsorption; visible spectrophotometry
GND Keyword:Zement; Polymere
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik / 540 Chemie
BKL-Classification:35 Chemie / 35.80 Makromolekulare Chemie
51 Werkstoffkunde / 51.70 Polymerwerkstoffe, Kunststoffe
Licence (German):License Logo Creative Commons 4.0 - Namensnennung (CC BY 4.0)