Polymerization of methyl methacrylate with the use of cetyl trimethyl ammonium bromide-benzoyl peroxide combination as the initiating system
TL;DR: In this paper, the authors used Cetyl trimethyl ammonium bromide with benzoyl peroxide (CTABBZ 2 O 2 ) as the initiating system.
About: This article is published in European Polymer Journal.The article was published on 1978-01-01. It has received 13 citations till now. The article focuses on the topics: Polymerization & Benzoyl peroxide.
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TL;DR: In this paper, the photopolymerization of MMA at 35° was studied using benzophenone (BP)-dimethylaniline (DMA) combination as photo-redox initiator.
23 citations
TL;DR: In this article, a new termination reaction known as the primary radical termination (PRT) was observed by a deviation from the simple kinetic law and was determined by several kinetic models to be more important than the constant of bimolecular termination.
Abstract: Styrene was polymerized with azobiscyanovaleric acid (ACVA) to obtain carboxy-telechelic polystyrene. Our aim was to synthesize an oligostyrene with a molecular weight of about 2000 g/mol. Thus, styrene was polymerized at 90 °C, where t 1/2ACVA is very short, and at very high initiator concentrations. In these conditions a new termination reaction appeared, known as the primary radical termination (PRT). At first, PRT was observed by a deviation from the simple kinetic law. Then, the constant of PRT was determined by several kinetic models to be more important than the constant of bimolecular termination. Finally, the PREDICI simulation program was used to confirm the predominance of PRT. This simulation program allowed the determination of the constant of primary radical deactivation k rr and the influence of this reaction on the conversion rate.
19 citations
TL;DR: Systeme donneur d'electrons-tetrachlorure de carbone, systeme dioxyde de soufre et halogenure organique; systeme carbonyle et CCl 4 ; systeme induit photochimiquement; systemes divers
15 citations
TL;DR: In this paper, the authors studied the photopolymerization of methyl methacrylate (MMA) using near UV/visible light at 40°C and employing the morpholine (MOR) −bromine (Br 2 ) charge transfer (CT) complex as the photoinitiator.
12 citations
TL;DR: In this paper, the authors performed a near-bulk and in fairly dilute solutions in DMF at 40° with CPB-BZ2O2 combination as the redox initiator in the dark and CPB as the sole photoinitiator in visible light.
11 citations
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TL;DR: In this paper, the properties of dilute solutions of conventional polymethyl methacrylate designed to characterize the chain length and its distribution, the intramolecular chain interactions and the thermodynamic interactions with solvent and their effects on the chain dimensions, and to establish the accuracy and reproducibility of such data.
155 citations
TL;DR: In this paper, the copolymerization of styrene and methyl methacrylate at 60° and 0 and 60° using 2,2′-azo-bis-isobutyronitrile labeled with C14 as initiator has been investigated.
Abstract: Styrene has been polymerized at 60° and methyl methacrylate at 0 and 60° using 2,2′-azo-bis-isobutyronitrile labeled with C14 as initiator. The average number of labeled end groups per molecule has been determined for the various polymers and so the relative importances of combination and disproportionation have been assessed. It has been found that polystyrene radicals undergo combination at 60°. In the case of methyl methacrylate, disproportionation occurs about 6 times as frequently as combination at 60° and about 1.5 times as frequently at 0° the activation energy for disproportionation is about 4 kcal. per mole greater than that for combination. The copolymerization of styrene and methyl methacrylate at 60° has been studied by this technique. It is found that when polystyrene radicals interact with polymethyl methacrylate radicals at this temperature combination occurs. The rates of initiation in the copolymerizations have been determined by a new method; the rate of this step is found to be virtually independent of the composition of the monomer mixture.
133 citations