Briefly sodium naphthalene sulfphonate formaldehyde research status, introduced polycarboxylate superplasticizer chemical structure, mechanism of action, performance characteristics, and made a polycarboxylate superplasticizer future research content and research directions. Superplasticizer domestic development situation superplasticizer aka super plasticizer used in the concrete mix. Mainly from three different functions: ① In order to improve the performance of concrete sodium naphthalene sulfphonate formaldehydesodium naphthalene sulfphonate formaldehyde pouring. Without changing the composition of concrete conditions to improve workability; ② under the given conditions of work, to reduce the water-cement ratio and concrete mixing water, improve the strength and durability of concrete, and cement from a concrete water reducer discusses the causes of both cement and water reducer incompatible analyze the mechanism of sodium naphthalene sulfphonate formaldehyde poly carboxylic acid superplasticizer is better than the other, but also on the concrete admixture superplasticizer slump the reason excessive loss mechanism and countermeasures discussed.
Proposed to adapt the so-called compatibility issues between concrete admixtures and cement and suited, can be considered: the preparation of concrete, concrete admixture according to technical specifications, will meet the relevant standards by testing some admixture admixture to press provisions of this variety can be used in cement admixtures, if it can produce the desired effect sodium naphthalene sulphonate formaldehyde, the cement admixture is compatible with this, the role of the initiator under, MPEG (polyethylene glycol monomethyl ether), MAA (methyl methacrylate) and acrylamide monomers can be copolymerized in an aqueous solution, a new type of synthetic polycarboxylate superplasticizer. By infrared spectroscopy (FT-IR) to study the degree of polymerization of superplasticizer MPEG molecular structure and gel permeation chromatography, the impact of relative molecular mass size and performance. The results showed that: when MPEG degree of sodium naphthalene sulphonate formaldehyde of 25, the synthesized Polycarboxylate the best overall performance.
Poly-carboxylic acid superplasticizer is an amphiphilic graft copolymer having a comb-like structure, mainly composed of different monomers polymerized by free radicals in aqueous solution l ']. Sodium naphthalene sulfonate formaldehyde as raw materials. Since poly shuttle acid superplasticizer changed Cai superplasticizer poor performance and environmental pollution problem at the root, so its range more widely said. Polylactic acid superplasticizer shuttle molecular structure can be designed according to the need.
http://www.xyd-chem.com/
http://www.xydchem.com/
http://www.whxydchem.com/cgi/search-en.cgi?f=news_en2+news_en3+product_en2+product_en3+product_en4&t=main_en&switch1=checked
Proposed to adapt the so-called compatibility issues between concrete admixtures and cement and suited, can be considered: the preparation of concrete, concrete admixture according to technical specifications, will meet the relevant standards by testing some admixture admixture to press provisions of this variety can be used in cement admixtures, if it can produce the desired effect sodium naphthalene sulphonate formaldehyde, the cement admixture is compatible with this, the role of the initiator under, MPEG (polyethylene glycol monomethyl ether), MAA (methyl methacrylate) and acrylamide monomers can be copolymerized in an aqueous solution, a new type of synthetic polycarboxylate superplasticizer. By infrared spectroscopy (FT-IR) to study the degree of polymerization of superplasticizer MPEG molecular structure and gel permeation chromatography, the impact of relative molecular mass size and performance. The results showed that: when MPEG degree of sodium naphthalene sulphonate formaldehyde of 25, the synthesized Polycarboxylate the best overall performance.
Poly-carboxylic acid superplasticizer is an amphiphilic graft copolymer having a comb-like structure, mainly composed of different monomers polymerized by free radicals in aqueous solution l ']. Sodium naphthalene sulfonate formaldehyde as raw materials. Since poly shuttle acid superplasticizer changed Cai superplasticizer poor performance and environmental pollution problem at the root, so its range more widely said. Polylactic acid superplasticizer shuttle molecular structure can be designed according to the need.
http://www.xyd-chem.com/
http://www.xydchem.com/
http://www.whxydchem.com/cgi/search-en.cgi?f=news_en2+news_en3+product_en2+product_en3+product_en4&t=main_en&switch1=checked