Explanation

A kind of grafted polymer, characterized by neat branched chains, basically the same molecular weight of the connected branches, and generally without branched chains, so that the molecular shape of the graft copolymer obtained is like a comb. During synthesis, the polymer of the main chain should have reactive groups or atoms. First dissolve it, and then add the monomer and catalyst to be grafted or the pre prepared active chain. Graft copolymerization can take place. For example, a comb shaped polymer with PS branch chain can be obtained by the reaction of PVC grafting active PS: CH-CH, - CH-CH, - CH - (PVC)+2I2I2IClClCl The PS chain connected in the above reaction is obtained by active anion polymerization, and the ionic catalyst Li+reacts with the C1 atom in PVC to connect PS. Since the molecular weight of the living polymerization can be designed in advance, the molecular weight of the connected branch chain is also determined.

Classification