INFLUENCE OF CA2+ ON THE PERFORMANCE OF POLY(ACRYLIC ACID)-G-POLY(ETHYLENE GLYCOL) COMB-LIKE COPOLYMERS IN CEMENT SUSPENSIONS

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RAN QIANPING; QIAO MIN; LIU JIAPING

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Journal Paper

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Journal: Iranian Polymer Journal Year:2014 | Volume:23 | Issue:9 Page(s): 663-669

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Title

INFLUENCE OF CA2+ ON THE PERFORMANCE OF POLY(ACRYLIC ACID)-G-POLY(ETHYLENE GLYCOL) COMB-LIKE COPOLYMERS IN CEMENT SUSPENSIONS

Author(s)

RAN QIANPING | QIAO MIN | LIU JIAPING | Issue Writer Certificate

Keywords

POLYCARBOXYLATE COMB-LIKE COPOLYMER

CALCIUM ION

CEMENT

ADSORPTION

CONFORMATION

Abstract

Poly (acrylic acid)-g-poly (ethylene glycol) (PAA-g-PEG) comb-like copolymer (PCE) is one of the best kind of superplasticizers for CEMENT suspensions. But PCE can be considered as polyelectrolyte which is easily affected by the ions in CEMENT suspensions. In CEMENT system, CALCIUM IONs are the most abundant cations which would have great influence on the performance of polymer superplasticizer. Here, the effects of CALCIUM ION on the surface charge, ADSORPTION and dispersion in CEMENT system with PCE as dispersant are investigated in detail. And the changes in the CONFORMATION of PCE before and after adding CALCIUM IONs are studied by methods of dynamic light scattering and transmission electron microscopy. CALCIUM IONs increase the zeta potential of CEMENT particles and make the molecular chains of PCE curlier, which induces the changes in ADSORPTION and dispersion behavior. The adding of CALCIUM IONs makes the ion bridging between calcium and PCE to take place and the ion bridging makes the PCE molecules shrink to smaller size. In this paper, it tells that the molecular structure of PCE polymer could be changed based on the conclusion to adapt the CEMENT with different content of calcium. In CEMENT suspensions, the effect of CALCIUM IONs on the performance of PCE polymer would be weakened by decreasing the content of carboxyl groups in the molecular chain.

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APA: Copy

RAN, QIANPING, QIAO, MIN, & LIU, JIAPING. (2014). INFLUENCE OF CA²⁺ ON THE PERFORMANCE OF POLY(ACRYLIC ACID)-G-POLY(ETHYLENE GLYCOL) COMB-LIKE COPOLYMERS IN CEMENT SUSPENSIONS. IRANIAN POLYMER JOURNAL (ENGLISH), 23(9), 663-669. SID. https://sid.ir/paper/634126/en

Vancouver: Copy

RAN QIANPING, QIAO MIN, LIU JIAPING. INFLUENCE OF CA²⁺ ON THE PERFORMANCE OF POLY(ACRYLIC ACID)-G-POLY(ETHYLENE GLYCOL) COMB-LIKE COPOLYMERS IN CEMENT SUSPENSIONS. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2014;23(9):663-669. Available from: https://sid.ir/paper/634126/en

IEEE: Copy

QIANPING RAN, MIN QIAO, and JIAPING LIU, “INFLUENCE OF CA²⁺ ON THE PERFORMANCE OF POLY(ACRYLIC ACID)-G-POLY(ETHYLENE GLYCOL) COMB-LIKE COPOLYMERS IN CEMENT SUSPENSIONS,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 23, no. 9, pp. 663–669, 2014, [Online]. Available: https://sid.ir/paper/634126/en

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