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 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.

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.

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