Briefs - "Catalytic Synthesis of Acrylic Acid and Ethyl Acrylate from Acetylene, Carbon Monoxide, and Water or Ethanol Under Pressure"

1964 ◽  
Vol 56 (4) ◽  
pp. 79-79
Author(s):  
S. K. Bhattacharyya ◽  
A. K. Sen
Keyword(s):  
Carbon Monoxide ◽  
Acrylic Acid ◽  
Ethyl Acrylate ◽  
Catalytic Synthesis ◽  
Acetylene Carbon

Study on Relationship between Structure and Properties of Polycarboxylate Superplasticizer

2012 ◽  
Vol 487 ◽  
pp. 43-47
Author(s):  
Sheng Hua Lv ◽  
Di Li ◽  
Qiang Cao
Keyword(s):  
Acrylic Acid ◽  
Zeta Potential ◽  
Ethyl Ester ◽  
Functional Groups ◽  
Cement Paste ◽  
Ethyl Acrylate ◽  
Structure And Properties ◽  
Polycarboxylate Superplasticizer ◽  
Carboxylic Groups

A polycarboxylate superplasticizer (PCs) was synthesized by copolymerization of allyl polyoxyethylene ethers (APE), acrylic acid (AA), sodium methylallyl Sulfonate (SMAS) and ethyl acrylate (EA). The effect of functional groups and branch chain on PCs properties was investigated by the test of fluidity of cement paste, retardation performance and Zeta potential of cement particles. The results showed that carboxylic groups and ethyl ester groups can improve water reducing ratio and fluidity of cement paste, and the sulfonic groups has an important contributiion to retardation performance of PCs.

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