Synthesis and properties of graft copolymers of cotton cellulose with fluoroethylenes in presence of Ce4
Abstract Chemical graft polymerization of some fluoromonomers on cotton cellulose has been investigated in presence of a redox system containing tetravalent cerium. Physical chemical methods have been used to study the structural features of graft copolymers of cotton cellulose with fluorine-containing polymers. It is assumed that the grafting process of the fluoromonomers occurs, in the main, in the amorphous regions of cellulose.
Summary ::: ::: The addition of 0.07 per cent Fe or more in the form of polycations decreased the total area of cracks and increased the number of transmissive pores of soils after simulated rainfall and drying. This resulted in increased per cent emergence and lower mean day of emergence of wheat plants. Per cent emergence (.v) was negatively correlated with penetrometer resistance (x). ::: ::: ::: ::: The increased germination was followed by greater plant growth, including increased plant height and yield. The Fe polycation treatments had no significant effect on root length measured at harvest.