Topic
Bulk polymerization
About: Bulk polymerization is a research topic. Over the lifetime, 8512 publications have been published within this topic receiving 179234 citations. The topic is also known as: mass polymerization.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: In this paper, the termination rate coefficients in free radical polymerization as a function of conversion and chain length were used to describe the RAFT-mediated LRP and conventional free-radical polymerization (FRP) up to the glass regime.
Abstract: A universal methodology to obtain the termination rate coefficients in free radical polymerization as a function of conversion and chain length was used to describe the RAFT-mediated “living” radical polymerization (LRP) and conventional free-radical polymerization (FRP) of methyl methacrylate (MMA) up to the glass regime. A composite termination model determined previously using the reversible addition-fragmentation chain transfer−chain length dependent−termination (RAFT-CLD-T) method, based on conversion (x) and chain length (i) dependent termination rate coefficient, (x), data, was the key parameter in obtaining accurate fits to the experimental rate and molecular weight data. Two kinetic modeling approaches were used in this study: (i) model 1: full chain length distributions; (ii) model 2: “method of moments”. Both approaches gave excellent agreement with experimental results for the evolution of conversion and MWD for RAFT-mediated polymerizations and accurately described the kinetics after the g...
50 citations
TL;DR: A review of relevant microscopic processes, both chemical and physical, which occur during suspension, bulk and emulsion polymerization (both before and after pressure drop) is given in this paper, where the state of the art of kinetic modelling of monomer consumption rate, reactor pressure, molecular weight and short and long chain branching development and polymer chain microstructure is illustrated.
Abstract: A review of relevant microscopic processes, both chemical and physical, which occur during suspension, bulk and emulsion polymerization (both before and after pressure drop) is given. The state of the art of kinetic modelling of monomer consumption rate, reactor pressure, molecular weight and short and long chain branching development and polymer chain microstructure is illustrated. The effects of diffusion-controlled termination and propagation reactions and the significant decrease in initiator efficiency and decomposition rate constant at high monomer conversions on the relative rates of various chemical reactions are discussed. The application of temperature programming and semibatch operation are emphasized. Finally, attempts to model polymer particle morphology are described.
50 citations
Patent•
26 Feb 1997TL;DR: In this article, a free radical bulk polymerization process for producing a rubber modified polymer from a vinyl aromatic monomer comprising: polymerizing the polyamide monomer in the presence of a diene rubber having at least one stable free radical group, under polymerization conditions such that a polyamide diene block and/or graft copolymer rubber is formed.
Abstract: The present invention is a free radical bulk polymerization process for producing a rubber modified polymer from a vinyl aromatic monomer comprising: polymerizing the vinyl aromatic monomer in the presence of a diene rubber having at least one stable free radical group, under polymerization conditions such that a vinyl aromatic-diene block and/or graft copolymer rubber is formed.
50 citations
TL;DR: In this article, it is shown that during the polymerization of 1,3-cyclohexadiene initiated by polystyryllithium in cyclohexane a tranfer to the monomer takes place, as previously reported.
Abstract: It is confirmed that during the polymerization of 1,3-cyclohexadiene initiated by polystyryllithium in cyclohexane a tranfer to the monomer takes place, as previously reported. It is shown that a part of the metallated monomer reinitiates the polymerization and another part decomposes to inert lithium hydride. The formation of 1,4-cyclohexadiene is observed and interpreted. The transfer constant is deduced from measured molecular weights. The propagation constants were reported in a previous paper of this series. Knowing these values, the ratio between reinitiation and decomposition constants is deduced from a comparison between experimental kinetics and a numerical resolution of kinetic equations. This study allows a prediction of the best conditions for the synthesis of block copolymers including poly(1,3-cyclohexadiene) sequences in 1–4 addition.
50 citations
TL;DR: Preparation par reaction de la p-cyanopyridine avec les halogenures de benzyle correspondants puis par echange du contre anion avec SbF 6 −.
Abstract: Preparation par reaction de la p-cyanopyridine avec les halogenures de benzyle correspondants puis par echange du contre anion avec SbF 6 − . Les 2 sels ont une activite d'amorceur de la polymerisation cationique du phenyl glycidyl ether superieure a celle de l'hexafluoroantimoniate de benzyl-1 cyano-4 pyridinium
49 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2024 | 1 |
| 2023 | 9 |
| 2022 | 11 |
| 2021 | 32 |
| 2020 | 45 |
| 2019 | 66 |