What is glyoxalted polyacrylamide (GPAM)?

The glyoxalted polyacrylamide (GPAM) resins were obtained by cross-linking reaction between glyoxal and cationic polyacrylamide (CPAM) through aqueous solution copolymerization. The based CPAM was synthesized with acrylamide (AM) and diallyl dimethyl ammonium chloride (DADMAC) as raw materials by living free radical solution polymerization.

Is glyoxal a strength enhancing polymer?

F ig. 5 showed the effects of the variation dosage of gly oxal from 15 to 35% by weight, based on the weight of the total monomers. As is generally observed, the strength-enhancing character of the poly mers was all very excellent with the dosage of glyoxal wa s 25%, 30%, 35%. But effects to the strength characteristics of paper.

How GPAM resins are used in paper-making?

The structure of the resulting product was characterized by FT-IR, 1H-NMR. Then the GPAM resins were used in the process of paper-making as wet-end additive, the results showed that the paper sheets can get a significant increase in strength properties from the added novel product.

Can GPAM resin be used as a wet-end additive?

Then the GPAM resins were used in the process of paper-making as wet-end additive, the results showed that the paper sheets can get a significant increase in strength properties from the added novel product. Content may be subject to copyright.

Are GPAM resins synthesized by two-step polymerization?

The dry-tensile and wet-tensile strengths of the sheets Wettre (L&W) tensile testers. Wet-tensile strengths were expressed as wet-streng th retention rate. Effect of synthesis conditions on strength development of GPAM resin. In this study, GPAM resins were sy nthesized by means of “two-step” poly merization.

Which cationic monomer is used for GPAM?

DMC was chosen as the cationic monomer. As shown the obtained GPAM decreased. The reasons were that residual DMC monomer, so the MW decreased. GPAM. ing ability of GPAM.