The polymerization may take place by either autoclave or tubular reactors. Summary. low molecular weight; Sigma-Aldrich ... Poly(ethylene-co-vinyl acetate) 4 Product Results | Match Criteria: Product Name, Property, Description Linear Formula: (CH 2 CH 2) m [CH 2 CH(OCOCH 3)] n. CAS Number: 24937-78-8. EP0279384B1 - Vinyl acetate-ethylene copolymer emulsions prepared in the presence of a stabilizing system of a low molecular weight polyvinyl alcohol and a surfactant - Google Patents
In this study, three types of ethylene vinyl acetate (EVA) copolymers with the same vinyl acetate (VA) content (27.2–28.8 wt %) but with different melt flow indexes (MFI; g (10 min) −1) of 365–440 (Elvax 210), 38.0–48.0 (Elvax 240) and 2.6–3.4 (Elvax 265) were used as impact modifiers for PS.
Search results for vinyl acetate at Sigma-Aldrich.
Ethylene-vinyl acetate (EVA), also known as poly (PEVA), is the copolymer of ethylene and vinyl acetate.
The well known structure of PE (-CH2CH2-)n is simplified because practically all polyethylenes are branched. Although easier-processing LLDPE is being introduced, EVAs are still the easiest polymers to process for numerous applications.
G. G. Krasnyanskaya 1, B. V. Gryaznov 1, V. A. Kryunina 1, S. L. Lyubimova 1, V. N. Monastyrskii 1 & R. A. Terteryan 1 Chemistry and Technology of Fuels and Oils volume 10, pages 615 – 618 (1974)Cite this article. Ethylene vinyl acetate copolymers are made using two monomers: ethylene and vinyl acetate (VA).
Ethylene-vinyl acetate copolymer (EVA), for instance, is produced by the copolymerization of ethylene and vinyl acetate under pressure, using free-radical catalysts.
The molecular weight is high, so finished products will be relatively resistant to mechanical damage and elevated temperatures. Typically packaging grades contain 33% butyl acrylate.
2 Citations. Synthomer’s polyvinyl acetates homopolymers and acid copolymers of vinyl acetate. The effect of the content of vinyl acetate groups in ethylene-vinyl acetate copolymer on the properties of polymer composite based on low density polyethylene and polyamide-6 was studied. Polymerization of EVA The percent of VA incorporated into the polymer backbone can vary from 0 to 40.
The ethylene-vinyl acetate (EVA) matrix containing furosemide was prepared by the casting method and the release patterns were observed. Ethylene-vinyl acetate. Influence of low-molecular-weight copolymers of ethylene with vinyl acetate on the low-temperature properties of diesel fuel. They are thermoplastic solids with a range of molecular weights, typically supplied in the form of small beads.
They are typically used to make: Thermo-adhesive films for the textile and automobile industries Ethylene segments pack into crystals during solidification Vinyl acetate limits the size and quantity of crystals Ethylene Vinyl Acetate (VA) Changing the ratio of ethylene and vinyl acetate in the polymer controls crystallinity 0 10 20 30 40 50 60 0 10 20 30 40 ity % Vinly Acetate % External CHEMICAL PROFILE: Vinyl acetate: Ethylene is now the preferred feedstock for VAM /vinyl acetate monomer/, largely replacing the earlier acetylene-based process. Compared with other ethylene-vinyl acetate copolymers, Elvax® 40L-03 contains extremely low amounts of gel, or high molecular weight polymer, that can cause undesirable characteristics in finished products Figure 1 illustrates the polymerization (1).
Figure 1.
Sato, T., Okaya, T. Characterization and Physical Properties of Low Molecular Weight Poly(vinyl acetate) and Poly(vinyl alcohol). 20 Accesses. Metrics details. Cite this article. Scheme of the domains structure of the ethylene-co-n-butyl acrylate (EBA) copolymer.