Molecular Parameters of Hyperbranched Polymers Made by Self-Condensing Vinyl Polymerization. 1. Molecular Weight Distribution

摘要: The molecular weight distribution (MWD) and its moments are calculated for hyperbranched polymers formed by self-condensing vinyl polymerization (SCVP) of monomers (“inimers”) with the general structure AB*, where A is a group B* an initiating group. MWD extremely broad, polydispersity index (PDI) being equal to number-average degree polymerization:  Pw/Pn = Pn. It twice as broad that polycondensation AB2 type monomers. If fraction unreacted monomer not taken into account, becomes somewhat narrower, P‘w/P‘n ≈ 0.40P‘n. kinetics process first order respect concentration groups; Pn, Pw, PDI increase exponentially time. Comparison theoretical results experimental data indicates rate constant addition active center decreases increasing polymerization. Since there two different centers in SCVP, na...