Characterization of Polydisperse Solutions of Branched Poly(methyl methacrylate) Using Size Exclusion Chromatography with Online Multiangle Light Scattering and Viscosity Detection

Impact of multi-vinyl taxogen dimensions on high molecular weight soluble polymer synthesis using transfer-dominated branching radical telomerisation

“…Gelation, caused by extended interchain crosslinking, occurs even at very low vinyl group conversion when employing multi-vinyl monomers, leading to insoluble gel fractions of nominally 'infinite molecular weight'. 13,15 This was first discussed in detail and predicted by Flory-Stockmayer theory, which utilised a theoretical ideal scenario to determine that the gel point is associated with the creation of ≥1 multi-vinyl monomer derived crosslink per linear primary chain. 16,17 In recent years, several researchers have achieved multi-vinyl monomer homopolymerisation to relatively high conversion (reaction of <70% of available vinyl functionality) by employing deactivation-enhanced atom transfer radical polymerisation (DE-ATRP) or reversible additionfragmentation chain transfer (RAFT) polymerisation.…”

Molecular weight distributions from size separation data for hyperbranched polymers

“…The characterization of branched polymers is challenging, because (even in the hypothetical case of an SEC system without band broadening) a sample of branched polymers with the same V h in general contains chains with a range of molecular weights. This effect is called variously5 “imperfect resolution,”6 “structural polydispersity,”7 or “local polydispersity,”8, 9 the term used here.…”

Multidimensional analytical protocols for the fractionation and analysis of complex polyolefins

“…With TriSEC, absolute molar mass determination is possible for polymers that are very different in chemical composition and molecular conformation. The usefulness of the TriSEC approach has been demonstrated in a number of applications 58–64 …”