Progresses in Synthesis of Polycarboxylate Superplasticizer
Through the analysis of references, it was found that PCE synthesized at room temperature had the same performance with PCE synthesized at elevated temperature in terms of conversion rate and...
Progresses in Synthesis of Polycarboxylate Superplasticizer
Abstract. The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties
Preparation and properties of allyl ether-based
The PDI value of 30% NS/PCE was much greater than 1, which may be due to the excess of nanoparticles addition resulted in a strong cross-linking between NS and PCE. 21 It is found in Table 5 that the Mn of the superplasticizer increases progressively as the NS content increases and the molecular chain of the superplasticizer is grown, which can
Amphoteric polycarboxylate superplasticizers with enhanced
Three kinds of amphoteric polycarboxylate (APC) superplasticizers with cation groups have been synthesized. A polycarboxylate ether (PCE1) without cationic group and a commercial product (PCE2) were used as contrasts. The characterization for the molecular structure and composition indicates the successful preparation of APC.
Preparation and properties of polycarboxylate
In this paper, ethyl glucose (Glc), 2-amino-4-methyl-5-phospho-3-pentenoate (AMEPA) and p-toluene sulfonic acid (PTS) were esterified, and the esterified products were polymerized with acrylic acid...
- What is a polycarboxylate superplasticizer?
- In contrast to other polycarboxylate superplasticizer such as sodium bisulfite and tonalite, polycarboxylate molecules generated through the REDOX system of hydrogen peroxide and ammonium persulfate Vc exhibit a compact high monomer conversion and molecular weight distribution.
- What are viscosity reducing polycarboxylate superplasticizers (Jn-PCE)?
- In this study, we synthesized a series of viscosity-reducing polycarboxylate superplasticizers (JN-PCE) utilizing allyl polyethylene glycol ether (APEG), acrylic acid (AA), and sodium methallyl sulfonate (SMAS) as raw materials through the process of free radical polymerization.
- Does polycarboxylate superplasticizer alter dispersion and water-reducing effects?
- Polycarboxylate superplasticizer, synthesized using different methods, may alter dispersion and water-reducing effects. The synthesis of PCE involves creating a novel macromolecular monomer with a controllable molecular mass, adjustable lipophilic, and hydrophilic moieties, as outlined in this study.
- What is microcapsule type polycarboxylate superplasticizer?
- The micro-capsule type polycarboxylate superplasticizer utilizes the protective effect and swelling effect of the capsule shell layer to slowly release the polycarboxylate superplasti-cizer to supplement adsorption at a later stage, so as to achieve the object of long-term and stable slump retain-ing.
- What is the molecular structure of modified polycarboxylate superplasticizer (PCE-P)?
- The FTIR results revealed that the molecular structure of the modified polycarboxylate superplasticizer (PCE-P) comprised sulfonic acid, carboxylic acid, and polyepoxyethane vinyl groups, exhibiting a comb-like molecular structure.
- Do polycarboxylic superplasticizers increase hydration products?
- The hydration products of C 3 A and C 4 AF in the PC increased with an increase in the dosage of polycarboxylic superplasticizers, and the ζ potential became positive as they become positively charged [76, 77].
