Many incidents involving the runaway polymerization of vinyl acetate monomers (VAM) are known. Poly(vinyl acetate) with predetermined molecular weight and relatively low polydispersity was successfully synthesized. In processes where the polymerization initiator was dissolved in the monomer, the initiator premix polymerized violently in the premix vessel. Controlled Radical Polymerization of Vinyl Acetate Mediated by a Bis(imino)pyridine Vanadium Complex Laura E. N. Allan, † Edward D. Cross, † Timothy W. Francis-Pranger, † M. … Vinyl acetate was then added with a syringe under argon. Possible explanations for this behaviour have been proposed and tested in this work, by measuring radical-loss rates directly with γ-relaxation … The compositions of the resultant polymers obtained from 1 H and 13 C{ H 1} Controlled free radical polymerization of vinyl acetate with cobalt acetoacetonate 523 2.2a Bulk polymerization of vinyl acetate with Co(acac) 2 catalyst/DMF ligand/BZPO: DMF, Co(acac) 2, and BZPO were added to the test tubes degassed with argon.
Polymerization of vinyl acetate (VOAc) was carried out using CCl4 as the initiator in the presence of the Fe(OAc)2/PMDETA (PMDETA = N,N,N‘,N‘‘,N‘‘-pentamethyldiethylenetriamine) complex.
The mixture was stirred and Learn more about polyvinyl acetate in this article. The polymerization of vinyl acetate wi th styrene and a-methylstyrene of various compositions has been studied by the free radical-initiated oxidative polymerization. The polymerization processes used include solution, suspension and emulsion processes. The polymerization of vinyl acetate is probably the second most frequent cause of runaway reaction accidents in the chemical industry, after the phenol + formaldehyde runaway reaction. The free radical polymerization of vinyl acetate in the presence of a liquid polysulfide H(SCH 2 CH 2 OCH 2 OCH 2 CH 2 S) n H (thiocol) was investigated from the point of view of reaction mechanism and characterization of the resulting copolymers. Controlled/living radical polymerization of vinyl acetate was achieved by a degenerative transfer process using alkyl iodides as transfer agents. In its most important application, polyvinyl acetate serves as the film-forming ingredient in water-based (latex) paints; it is also used in adhesives. This is considered to be due to two factors, namely, (1) the great solubility in water of vinyl acetate and (2) the fact that vinyl acetate is easily subject …
In this work, high molecular weight polyvinyl acetate (PVAc) (M n,GPC = 123,000 g/mol, M w /M n = 1.28) was synthesized by reversible addition‐fragmentation chain transfer polymerization (RAFT) under high pressure (5 kbar), using benzoyl peroxide and N,N ‐dimethylaniline as initiator mediated by (S )‐2‐(ethyl propionate)‐(O ‐ethyl xanthate) (X1) at 35 °C. Polyvinyl acetate, a synthetic resin prepared by the polymerization of vinyl acetate.
Therefore it is of interest to describe the circumstances where a runaway The monomer vinyl acetate (CH 2 =CHO 2 CCH 3) is prepared from ethylene by reaction with oxygen and acetic acid over a palladium catalyst.It is polymerized with free-radical initiators, primarily in emulsion processes, and forms the polymer phase in water-based paints. Macromolecules 2014 , 47 (15) , 4930-4942. It is generally admitted that the Smith‐Ewart equation is not applicable to the emulsion polymerization of vinyl acetate. Photoinduced Electron Transfer–Reversible Addition–Fragmentation Chain Transfer (PET-RAFT) Polymerization of Vinyl Acetate and N-Vinylpyrrolidinone: Kinetic and Oxygen Tolerance Study.
Polyvinyl acetate is prepared by the polymerization of vinyl acetate monomer (free radical vinyl polymerization of the monomer vinyl acetate). The reported independence of the rate of polymerization from the monomer concentration in the emulsion polymerization of vinyl acetate has been investigated.