Manufacture And Property Of Polyamide Polyamine Type Poly Carboxylic Superplasticizer

Polycarboxylate based superplasticizers are well concerned for its unique performance. After years of research and exploration, its products have already developed into the forth generations. Among both oversea and home patents, although there is already some reports about the forth-generation polyamide polyamine superplasticizer's manufacture and performance, its product is still vacuum in the market, therefore there is still a great lot of work to do on this kind of superplasticizer.This experiment researched the manufacture process of polyamide polyamine unit, diethylenetriamine, adipic acid and methacrylic acid as raw material. Finally temperature, hours, catalyse and polymerization inhibitor in two steps of amidation were fixed on, polyamide polyamine was successfully produced. By adjusting sort and dosage of polyamide polyamine, its influence to superplasticizer's structure and performance was researched. Further research was carried out via expansile acid/ ester proportion experiment, likewise superplasticezer of high performance was successfully manufactured.Via the techniques of infrared spectrum and laser multi-angle scattering method, the functional groups, the molecular weight and molecular weight distribution of the self-made superplasticeizer were determined and analyzed. It's proven that functional groups contained in superplasticizer match what is designed, but molecule weight distribution is not concentrated enough, which shows that performance of synthesized superplasticizer is not at the best. Terpolymer's performance such as setting, dispersion, dispersion maintenance and hydration heat was determined.At the end polyamide polyamine unit's influence to superplasticizer's structure and performance were researched and discussed.