WebAs predicted by Flory–Stockmayer theory, precise control of polymer architecture, molecular weight, and molecular weight distribution in the polymerization of tri-vinyl monomers has been recognized as a considerable challenge in polymer chemistry. Multi-responsive polymers are generally designed by incorporating multiple sensitive moieties ... WebFlory-Stockmayer theory says nothing concerning the detailed topology of the network, which grows and defines its structure through the random reaction of its reactive groups with other groups on the gel and with groups on sol species. To obtain a perfect network all reactions (sol-sol, sol-gel and gel-gel) are assumed to yield elastically ...
Theory of gelation - ScienceDirect
WebThe genius of the Flory theory lies in the assumption that we can consider a real polymer chain as composed of two components: an ideal chain (entropic contribution) and … WebAug 21, 2024 · It is well known that free radical (co)polymerization of multivinyl monomers (MVMs) leads to insoluble gels even at a low monomer conversion, and the gelation … signs symptoms of severe acid reflux
About: Flory–Stockmayer theory
WebThe static theories of equilibrium gelation (percolation theory) and vulcanization (Flory-Stockmayer theory) are well known. But many of the interesting experiments on polymer sols and gels concern dynamics (e.g., viscoelasticity), which are less universal and more difficult to describe theoretically than static properties.The dynamical response of a … WebMar 27, 2013 · The Flory-Stockmayer theory for the polycondensation of branched polymers, modified for finite systems beyond the gel point, is applied to the connection (synapses) of neurons, which can be considered highly branched “monomeric” units. Initially, the process is a linear growth and tree-like branching between dendrites and axons of … Gelation is promoted by gelling agents. Gelation can occur either by physical linking or by chemical crosslinking. While the physical gels involve physical bonds, chemical gelation involves covalent bonds. The first quantitative theories of chemical gelation were formulated in the 1940s by Flory and Stockmayer. Critical percolation theory was successfully applied to gelation in 1970s. A number of growth models (diffusion limited aggregation, cluster-cluster aggregation, kinetic ge… signs symptoms hypothyroidism