Analysis of Methyl Methacrylate Copolymers by Gas Chromatography

Pyrolysis-Gas Chromatographic Technique for Direct Analysis of Thermal Degradation Products of Polymers.

“…Different alcohols (about 6.5%) form the other main components, 5% hile the total amount of carbon monoxide and carbon dioxide corresponds to 7.9y0 of the original material The "unidentified" substances are most probably different n-butyl esters such as propionate. All of these results correspond m l l to the data given by Grassie(3) and to the results of brauer, Lehmann, StrassLurger, Tpron, and Forziati (6,8 ) and Radell and Strutz 10, n-butyl methacrylate the amount of 1,utanol-1 (listed unaer "unidentihpdJ'j is much less than t h t amount of ethyl alcohol. This means that although the ester might hydrolyze primarily t o butanol, tht latter decomposed nearly complete11 in the pyrolysis chamber.…”

“…Since the first publications on the application of this method for polymer pyrolysis studies (7, 8 ) , different variations of the technique have been described in the literature and its application was also extended for studies of other complex organic substances (4).…”

Thermal Characteristics of Coated Textile Fabrics

“…Samples were also degraded within the injection port of the gas chromatograph on a hot wire loop to afford a more direct examination of the degradation products as suggested by the work of Lehrle and Robb and others [11,12].…”

“…In Tables XI and XII the various liquid phases, packings, and the columns are described. The analysis of polymer degradation products by decomposing the polymer directly in the gas stream of the gas chromatograph is a new and useful technique [11,12,13]. This technique facilitates the removal of primary reaction products from the hot pyrolysis zone while minimizing the occurrence of secondary and tertiary reactions.…”

Apparatus which permits repeated gas-liquid chromatographic separations of a sample

“…The combination of a hot-filament or reaction vessel pyrolysis unit in line with a gas-liquid chromatograph (GLC) has been used very much in recent years to study the degradation of many polymers (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). This system offers three important advantages: the pyrolysis products are quickly removed from the pyrolysis chamber by the carrier gas of the GLC, thereby reducing the risk of further decomposition; there are no transfer losses between the pyrolysis unit and the GLC; and plug flow results-i.e., the pyrolysis products enter the GLC column in the concentrated state required for good peak resolution.…”