scholarly journals Kinetic Monte Carlo Simulation Based Detailed Understanding of the Transfer Processes in Semi-Batch Iodine Transfer Emulsion Polymerizations of Vinylidene Fluoride

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1008 ◽  
Author(s):  
Florian Brandl ◽  
Marco Drache ◽  
Sabine Beuermann
Keyword(s):  
Monte Carlo ◽  
Molar Mass ◽  
Chain Transfer ◽  
Vinylidene Fluoride ◽  
Kinetic Monte Carlo ◽  
Monomer Concentration ◽  
Chain Transfer Agent ◽  
Ideal Behavior ◽  
Iodine Transfer ◽  
Emulsion Polymerizations

Semi-batch emulsion polymerizations of vinylidene fluoride (VDF) are reported. The molar mass control is achieved via iodine transfer polymerization (ITP) using IC4F8I as chain transfer agent. Polymerizations carried out at 75 °C and pressures ranging from 10 to 30 bar result in low dispersity polymers with respect to the molar mass distribution (MMD). At higher pressures a significant deviation from the ideal behavior expected for a reversible deactivation transfer polymerization occurs. As identified by kinetic Monte Carlo (kMC) simulations of the activation–deactivation equilibrium, during the initialization period of the chain transfer agent already significant propagation occurs due to the higher pressure, and thus, the higher monomer concentration available. Based on the kMC modeling results, semi-batch emulsion polymerizations were carried out as a two pressure process, which resulted in very good control of the MMD associated with a comparably high polymerization rate.

Iodine transfer emulsion polymerizations of vinylidene fluoride

2020 ◽  
pp. 49-68
Author(s):  
Florian Brandl ◽  
Jan Schwaderer ◽  
Marco Drache ◽  
Sabine Beuermann
Keyword(s):  
Vinylidene Fluoride ◽  
Iodine Transfer ◽  
Emulsion Polymerizations

Iodine Transfer Copolymerization of Fluorinated α-Methylstyrenes with Styrene Using 1-Iodoperfluorohexane as the Chain Transfer Agent

2014 ◽  
Vol 47 (24) ◽  
pp. 8634-8644 ◽  
Author(s):  
Justyna Walkowiak-Kulikowska ◽  
Anna Szwajca ◽  
Frédéric Boschet ◽  
Véronique Gouverneur ◽  
Bruno Ameduri
Keyword(s):  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Iodine Transfer

scholarly journals Ab initiokinetic Monte Carlo simulation of seeded emulsion polymerizations of styrene

2018 ◽  
Vol 20 (16) ◽  
pp. 10796-10805 ◽  
Author(s):  
Marco Drache ◽  
Katrin Brandl ◽  
Rebecca Reinhardt ◽  
Sabine Beuermann
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Kinetic Monte Carlo ◽  
Monte Carlo Model ◽  
Radical Transfer ◽  
Emulsion Polymerizations

A kinetic Monte Carlo model for emulsion polymerizations based on elemental reactions and radical transfer into particles is introduced.

Copolymerization of Glycidyl Methacrylate and 1,1,1,3,3,3-Hexafluoroisopropyl Acrylate

2021 ◽  
Vol 899 ◽  
pp. 387-391
Author(s):  
Alexandra O. Grigoreva ◽  
Kseniia Tarankova ◽  
Sergey D. Zaitsev
Keyword(s):  
Glycidyl Methacrylate ◽  
Molar Mass ◽  
Chain Transfer ◽  
Good Control ◽  
Chain Transfer Agent ◽  
Polymeric Chain ◽  
Reactivity Ratios ◽  
Reversible Addition

The copolymerization of 1,1,1,3,3,3-hexafluoroisopropyl acrylate (HFIPA) and glycidyl methacrylate via reversible addition-fragmentation chain transfer (RAFT) process was investigated. 2-cyano-2-propyl dodecyl trithiocarbonate (CPDT) was used as chain transfer agent. It is turned out that CPDT and polymeric chain transfer agent obtained based on HFIPA and CPDT provide a good control over molar mass characteristic of copolymers (Đ = 1.05). Reactivity ratios were found to be r1(GMA) = 1.57 and r2(HFIPA) = 0.05 by Fineman–Ross model.

Synthesis and Investigation of pH-Switchable RAFT Agent in Polymerization of Styrene

2021 ◽  
Vol 899 ◽  
pp. 638-643
Author(s):  
Artem Vlasov ◽  
Alexandra O. Grigoreva ◽  
Sergey D. Zaitsev
Keyword(s):  
Mass Distribution ◽  
Molar Mass ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Chain Transfer Agent ◽  
Molar Mass Distribution ◽  
Reversible Addition ◽  
Raft Agent ◽  
Kinetic Features

pH-switchable chain transfer agent 1-cyano-1-methylethyl (phenyl)(pyridin-4-yl)-carbamodithioate (CMPC) was synthesized and reversible addition-fragmentation chain-transfer (RAFT) polymerization of styrene in presence of CMPC was studied. It was shown that presence of CMPC affects molar mass distribution and kinetic features and realizes supposed mechanism of RAFT polymerization. Different effect of CMPC on polymerization of styrene in presence of protic acids was studied.

Synthesis of micrometer-sized poly(methyl methacrylate) particles by microsuspension iodine transfer polymerization (ms ITP)

RSC Advances ◽  
2016 ◽  
Vol 6 (97) ◽  
pp. 95062-95066 ◽  
Author(s):  
P. Chaiyasat ◽  
S. Namwong ◽  
M. Okubo ◽  
A. Chaiyasat
Keyword(s):  
Methyl Methacrylate ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Poly Methyl Methacrylate ◽  
Iodine Transfer ◽  
A Chain ◽  
First Time ◽  
Pmma Particles ◽  
By Products

Micrometer-sized poly(methyl methacrylate) (PMMA) particles were successfully prepared without submicrometer-sized by-products for the first time by applying microsuspension iodine transfer polymerization with iodoform as a chain transfer agent.

scholarly journals Investigation of the Chain Transfer Agent Effect on the Polymerization of Vinylidene Fluoride

2019 ◽  
Vol 58 (46) ◽  
pp. 20976-20986 ◽  
Author(s):  
Igor Stefanichen Monteiro ◽  
Ana Carolina Mendez Ecoscia ◽  
Timothy F. L. McKenna
Keyword(s):  
Chain Transfer ◽  
Vinylidene Fluoride ◽  
Chain Transfer Agent
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