Simulation of radical polymerization of methyl methacrylate at room temperature using a tertiary amine/BPO initiating system

Abstract

International audienceThe decomposition kinetics of the initiation reaction between benzoyl peroxide and a tertiary amine, either dimethyl-p-toluidine or dihydroxyethyl-p-toluidine, was studied by infrared spectroscopy and an Arrhenius plot was established. Based on these results, a model was developed for the polymerization of methyl methacrylate at room temperature. The model used both free volume and empirical models for propagation, termination and several side reactions. The model described the conversion for a very broad range of reaction conditions and the results were in good agreement with the experimental data. This study showed significant differences between dimethyl-p-toluidine and dihydroxyethyl-p-toluidine with respect to the gel time and the molar mass of poly(methyl methacrylate)

Radical polymerization in the presence of peroxide and reducing agent monomer for branched polymers

“…It is well‐known that radical polymerization using a redox initiation system using an oxidizing and reducing agent has many advantages such as low activation energy and mild reaction conditions . Moreover, it has been widely reported that tertiary amines and benzoyl peroxide (BPO) serve as components of an effective redox initiating system to initiate the radical polymerization of MMA . In this article, we report the synthesis of branched PMMAs via redox‐initiated radical polymerization using BPO as the peroxide and methacrylate‐type momomer with tertiary amines moiety as the reducing agent monomer (RAM).…”

Synthesis, characterization and reaction kinetics of PMMA/silver nanocomposites prepared via in situ radical polymerization

“…A number of different values have been proposed. In the following we decided to make use those reported in a very recent paper by Zoller et al [44]. These authors propose the following values: k p = 2.67 Â 10 6 ⁄ exp(À22,360/RT), k t = 1.984 Â 10 8 ⁄ exp(À5890/RT) L/mol/s, k d = 5 Â 10 16 ⁄ exp(À143,000/RT) s À1 , k trM = 5 Â 10 À5 ⁄ k p while for f different values have proposed in literature.…”

Thermal and Mechanical Characterization of EMA-TEGDMA Mixtures for Cosmetic Applications

“…They were cured using the same powder component, constituted by PEMA, PMMA, and BPO, which acts as a thermal initiator [15,16]. The studied liquid formulations are mainly composed by a monofunctional monomer (EMA) and a difunctional monomer (TEGDMA).…”

“…In addition, liquid formulations also contain an activator of the polymerization process, which is DMT. By mixing these two components at room temperature, the activator reacts with the thermal inititator generating free radicals ( Figure 2) [16,17]. These radicals react with the double bonds of methacrylate groups of each monomer present in liquid formulations, giving rise to a random polymerization with more EMA and TEGDMA molecules, and finally lead to a crosslinked network ( Figure 3).…”