Abstract
This article describes our results for the thermal stability and thermal degradation of poly(alkyl methacrylates) based on selected methacrylate monomers, namely methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate, which are used in the polymer industry in the manufacture of construction polymers, polymeric films, and a wide range of adhesives. Quantitative analyses of the thermal degradation products of poly(methyl methacrylate), poly(butyl methacrylate), and poly(2-ethylhexyl methacrylate) were performed, principally with pyrolysis–gas chromatography at temperatures between 200 and 400 °C. The dependencies of the thermal stabilities of the tested poly(alkyl methacrylates) on their molecular weight were investigated. The major degradation products are the corresponding methacrylate monomers; the other thermal degradation by-products are carbon dioxide, carbon monoxide, methane, ethane, methanol, ethanol, and 1-propanol.
Highlights
IntroductionIn many branches of the polymer industry, the poly(alkyl methacrylates) based on the commercially available methacrylate monomers, methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate play crucial roles as materials for the manufacture of glass polymers, polymeric films, paint varnishes, sealants, coatings, and diverse kinds of adhesives that are used in modern technological processes
This article describes our results for the thermal stability and thermal degradation of poly(alkyl methacrylates) based on selected methacrylate monomers, namely methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate, which are used in the polymer industry in the manufacture of construction polymers, polymeric films, and a wide range of adhesives
In many branches of the polymer industry, the poly(alkyl methacrylates) based on the commercially available methacrylate monomers, methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate play crucial roles as materials for the manufacture of glass polymers, polymeric films, paint varnishes, sealants, coatings, and diverse kinds of adhesives that are used in modern technological processes
Summary
In many branches of the polymer industry, the poly(alkyl methacrylates) based on the commercially available methacrylate monomers, methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate play crucial roles as materials for the manufacture of glass polymers, polymeric films, paint varnishes, sealants, coatings, and diverse kinds of adhesives that are used in modern technological processes. Poly(alkyl methacrylates) are produced in the form of solvent-based, water-borne (dispersions), or solvent-free systems. Their properties depend on the type of alkyl group in the side chain. While chain elongation increases plasticization [1]. These polymers display several unique properties, such as extremely good weather and aging resistance, non-yellowing, low permeability of oxygen, and good plasticizer resistance. Their major advantages are photostability and resistance to hydrolysis. The thermal decomposition of methacrylic polymers is significant because of the deterioration of these properties during high-temperature processing [2]
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