Progresses in Synthesis of Polycarboxylate Superplasticizer - Hindawi
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
Synthesis and Properties of a Polycarboxylate Superplasticizer with a
Polycarboxylate superplasticizers (PCEs) emerged as one of the most important superplasticizers for concrete due to their superior performance. (1,2) Compared to other products like polycondensates, they fluidize cement even at low water to cement ratios, require relatively low dosages, and exhibit a long slump retention capability. (35) The
Research progress on polycarboxylate based superplasticizers with
Polycarboxylate ether/ester (PCE) superplasticizer is a new generation of superplasticizer following the development of poly (naphthalene sulfonate) (PNS), poly (melamine sulfonate) (PMS) and acetone formaldehyde sulfite (AFS) superplasticizers.
Synthesis of the VPEG Polycarboxylate Superplasticizer with
This paper focuses on the synthesis of a kind of VPEG polycarboxylate superplasticizer with controllable activity with 4-hydroxybutyl vinyl polyoxyethylene ether (VPEG), acrylic acid (AA) and
Adsorption and dispersion capability of polycarboxylate-based
A novel polycarboxylate superplasticizer (PCE) was synthesized by graft copolymerization between acrylic acid (AA) and end-functionalized poly (allyl sulfonate) (PALS) to produce comb polymer, i.e
- What is polycarboxylate superplasticizer?
- 1. Introduction The polycarboxylate superplasticizer is characterized by low dosage requirements, a high water-reducing rate, excellent slump retention performance, and strong designability and environmental friendliness during the production process, making them the most widely used admixture in modern concrete , , .
- What is the optimum polymerization condition for a polycarboxylate superplasticizer?
- The results showed that under the optimum polymerization conditions of the slowly-released polycarboxylate superplasticizer with high slump retention, the dosage of initiator, chain transfer agent and acrylamide was 0.3%, 0.25% and 0.9% based on the mass of the macromonomer, respectively.
- What is the difference between polycarboxylate superplasticizer and hydroxyl group?
- The polycarboxylate superplas-ticizer, which had suitable graft and block polymers of poly-ethylene glycol or polyoxyethylene, and a suitable sulfonic group, had small slump loss besides high water-reducing performance. On the other hand, the hydroxyl group at the end of the chain causes gelation easily.
- Does polycarboxylate superplasticizer have a good slump retention ability?
- Compared with commercial similar produces and other synthesized slowly-released polycarboxylate superplasticizer, the test results showed that the developed superplasticizer had an excellent slump retention ability. Export citation and abstract BibTeX RIS
- How are amide-structural polycarboxylate superplasticizers produced?
- In another study by Liu et al. , amide-structural polycarboxylate superplasticizers (amide-PCEs) were produced by amidation reaction between polyacrylic acid (PAA) and amino-terminated methoxy polyethylene glycol (amino-PEG) at 130–150°C.
- Can polycarboxylate superplasticizers adsorption and dispersion properties of PCE-P?
- Application Limited research has been conducted on the adsorption and dispersion properties of PC when combined with various polycarboxylate superplasticizers. PCE-P with a consistent main chain length but varying side chain lengths was synthesized by controlling the molar ratio of macromonomer to methacrylic acid.
