Progresses in Synthesis of Polycarboxylate Superplasticizer
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 of dispersion and water retention as well as enhancement in
Research progress on polycarboxylate based superplasticizers
Polycarboxylate ether/ester (PCE) superplasticizers are widely used due to their molecular structural designability, low dosage and high efficiency. However, their high sensitivity and strong interactions with clays in concrete reduce their dispersion and water-reduction capability, which can affect the performance of concrete seriously.
Polycarboxylate ether superplasticizer with gradient
In this paper, gradient and block polycarboxylate ether superplasticizers (PCEs) composed of allyl alcohol polyoxyethylene ether macromonomer and acrylic acid were synthesized via aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization. The molecular structure of PCEs was characterized by 1H nuclear magnetic resonance (NMR), Fourier transform infrared (FT-IR
Low-cost synthesis of high-performance polycarboxylic ether
As a new type of high-performance water-reducing agent, polycarboxylate ether (PCE) has excellent properties such as small dosage and high water reduction rate. However, it is still necessary to develop a synthetic process to improve the performance of PCE at a low cost.
Progresses in Synthesis of Polycarboxylate Superplasticizer
method of polycarboxylate superplasticizer at room tem- perature,” CN Patent 101974135, 2011. [57] C. J. Shi, “A new kind of synthesis method of polycarboxylate
- What is Polycarboxylate ether superplasticizer with cross-linked structure?
- The polycarboxylate ether superplasticizer with cross-linked structure (TPCE) was synthesized and characterized in this paper. The adsorption isotherms and kinetics of TPCE on cement and montmorillonite (MMT) were measured and the adsorption layer thicknesses on cement particles were calculated.
- What is polycarboxylate superplasticizer (PCE)?
- As one important auxiliary, superplasticizers have attracted lots of attention in the concrete and building materials field. Specially, polycarboxylate superplasticizer (PCE) has been widely applied due to its relatively low doping amount, high water reducing rate and environmental friendliness property.
- What is Polycarboxylate ether (PCE)?
- Polycarboxylate ether (PCE) is a new generation of superplasticizer, which was invented in 1981 , following the development of conventional lignosulfonate water reducing agent, naphthalene, and melamine-based superplasticizers.
- How are gradient and block Polycarboxylate ether superplasticizers synthesized?
- In this paper, gradient and block polycarboxylate ether superplasticizers (PCEs) composed of allyl alcohol polyoxyethylene ether macromonomer and acrylic acid were synthesized via aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization.
- How are polycarboxylate superplasticizers synthesized?
- In this work, a series of polycarboxylate superplasticizers (PCEs) were synthesized via copolymerization using a novel macromonomer, ethylene–glycol monovinyl polyethylene glycol (EPEG). The molecular structures were modified by varying the side chain length, carboxylate density and integrating sulfonic group.
- What is a carboxymethylated hyperbranched polyglycerol?
- Moreover, a carboxymethylated hyperbranched polyglycerol was synthesized that does not comprise a linear EO/PO side chain. This polymer was denoted as TMP (hyp.PG) (COOH) n and prepared in a two-step synthesis from trimethylol propane (TMP) and glycidol (see Scheme 2).
