Novel preparation method of starch-acrylamide grafted copolymer

Abstract

The invention discloses a novel preparation method of a starch-acrylamide grafted copolymer. The novel preparation method of the starch-acrylamide grafted copolymer comprises the following steps of: weighing starch and distilled water, and putting into a reaction vessel; stirring to gelatinize the starch; and adding an acrylamide monomer for reacting to obtain a product, and the like. In the invention, the starch and the acrylamide are reacted, so that the starch-acrylamide grafted copolymer can be synthesized successfully; moreover, synthesis efficiency is high, synthesis steps are simple, and synthesis cost is reduced; and initiator concentration in a preparation process is controlled, so that the transformation rate of a polymerization reaction and the limiting viscosity number of a polymer are increased.

Description

technical field [0001] The invention relates to a novel preparation method of a starch-acrylamide graft copolymer. Background technique [0002] my country is one of the countries with severe water shortage in the world, and the total amount of water resources in my country ranks fourth in the world, but according to the population statistics in 2002, the per capita water resources are 2220m 3 , only 1 / 4 of the world's per capita water resources, equivalent to 1 / 4 of the United States, 1 / 2 of Japan, and 1 / 44 of Canada, ranking 110th in the world. Moreover, the temporal and spatial distribution of water resources is extremely uneven, that is, there is more water in the south, less water in the north, more water in summer, and less water in winter, resulting in a situation of flooding in the south and drought in the north. The water resources in the south of the Yangtze River Basin account for more than 80% of the country's water resources, and only 1 / 3 of the country's culti...

AI Technical Summary

Problems solved by technology

[0014] In the preparation process of starch-acrylamide graft copolymer, the concentration of the added initiator has a great influence on the conversion rate of the polymerization reaction and the intrinsic viscosity of the polymer. When the concentration of the initiator is low, the concentration of free radicals is low and the reaction speed is slow. , the conversion rate is low; if the concentration of the initiator is too high, the reaction speed of the product will be too fast, the molecular weight will decrease, and the side reactions will increase at the same time

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