Polycarboxylate superplasticizer has more advantages than traditional naphthalene and aliphatic superplasticizer in mixing high strength grade concrete, but its advantages of high water reduction cannot be brought into full play when the strength is…
The polymers obtained by the polymerization of acrylic acid and its esters are collectively referred to as acrylic acid tree esters, and the corresponding plastics are collectively referred to as polyacrylic plastics, of which polymethyl methacrylate…
GH4049 is a nickel-based superalloy, which is an age-hardening alloy. The corresponding grade is GH49. Its nickel content is about 70%.…
A lead-acid battery (VRLA) is a battery whose electrodes are mainly made of lead and oxides, and the electrolyte is a sulfuric acid solution.…