Search Results - "LEHRLE, R. S"

Use of catalytic reforming to aid natural gas HCCI combustion in engines: experimental and modelling results of open-loop fuel reforming by Peucheret, S., Wyszyński, M.L., Lehrle, R.S., Golunski, S., Xu, H.

“…The potential of the homogeneous charge compression ignition (HCCI) combustion process to deliver drastically reduced emissions of NO x and improved fuel…”
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Thermal degradation mechanisms of Nylon 6 deduced from kinetic studies by pyrolysis-g.c by LEHRLE, R. S, PARSONS, I. W, ROLLINSON, M

“…The thermal degradation of Nylon 6 has been studied over the temperature range 350-500 deg C by pyrolysis-gas chromatography. Samples in the microgram range…”
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Thermal degradation mechanism and rate constants of the thermal degradation of poly(epichlorohydrin- co-ethylene oxide), deduced from pyrolysis-GC-MS studies by Soto-Oviedo, M.A, Lehrle, R.S, Parsons, I.W, De Paoli, M.-A

“…The thermal degradation mechanism and kinetic parameters for the overall degradation for the poly(epichlorohydrin- co-ethylene oxide) elastomer have been…”
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Use of pyrolysis-g.c.-m.s. to assess the thermal degradation behaviour of polymers containing chlorine. I. The limits of detection and measurement of HCl, deduced from a study of PVC pyrolysis by DADVAND, N, LEHRLE, R. S, PARSONS, I. W, ROLLINSON, M

“…From measurements of the yields of hydrogen chloride evolved from the thermal degradation of PVC samples, it is deduced that the authors' pyrolysis-gas…”
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Pyrolysis–GC–MS used to study the thermal degradation of polymers containing chlorine III. Kinetics and mechanisms of polychloroprene pyrolysis. Selected ion current plots used to evaluate rate constants for the evolution of HCl and other degradation products by Lehrle, R.S, Dadvand, N, Parsons, I.W, Rollinson, M, Horn, I.M, Skinner, A.R

“…The thermal degradation of polychloroprene [poly(2-chlorobutadiene)/Neoprene] has been studied at 387°C by pyrolysis–GC–MS techniques. First, the overall rate…”
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Use of pyrolysis-GC–MS to assess the thermal degradation behaviour of polymers containing chlorine II. Thermal stability characteristics of Neoprene/chlorobutyl rubber composites, before and after artificial ageing by Dadvand, N., Lehrle, R.S., Parsons, I.W., Rollinson, M., Horn, I.M., Skinner, A.R.

“…Some composites containing a cross-linked blend of Neoprene and “chlorobutyl rubber” have been artificially aged at temperatures of 35 and 80°C for up to 3…”
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Mass spectrometry detection versus flame ionisation detection in pyrolysis–gas chromatography: spurious pyrolysis peaks and possible errors in estimating relative product yields by Lehrle, R.S., Rollinson, M., Dadvand, N., Parsons, I.W.

“…In the first part of this paper it is demonstrated that spurious pyrolysis peaks can arise when a mass spectrometer (m.s.) is used as the detector in…”
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Intramolecular hydrogen transfer in thermal degradation: comments on the size distribution of the backbite rings by Lehrle, R.S., Pattenden, C.S.

“…Consideration is given to the probable sizes of the ring transition states corresponding to intramolecular hydrogen transfer reactions occurring during thermal…”
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Modification of natural rubber: a study to assess the effect of vinyl acetate on the efficiency of grafting methyl methacrylate on rubber in latex form, in the presence of azo-bis-isobutyronitrile by Lehrle, R.S., Willis, S.L.

“…On the basis of the proposal that highly reactive vinyl acetate (VAc) radicals could facilitate the grafting of other monomers on to natural rubber (NR), the…”
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A critical comparison of procedures for evaluating rate constants in thermal degradation, illustrated by pyrolysis-g.c. results from four polymers by Bate, D.M., Lehrle, R.S., Pattenden, C.S., Place, E.J.

“…When studying the thermal degradation of macromolecular compounds that give volatiles, several methods are available for verifying the extent to which the rate…”
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Gamma radiolysis of dilute polyisobutylene solutions: influence of solvent by Lehrle, R.S., Pattenden, C.S.

“…Solutions of polyisobutylene have been irradiated with gamma rays from a Cobalt source. One percent concentrations (w/v) in the solvents methyl cyclohexane,…”
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Quantitative modelling predicts the MWs, structures, and yields of 55 volatile products from the pyrolysis of polyisobutylene by Lehrle, R.S, Pattenden, C.S

“…Pyrolysis–GC shows that high MW polyisobutylene can degrade thermally to give more than 60 volatile products. This paper sets out to predict their molecular…”
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The effect of blending on polymer stability: kinetics and mechanisms by Bate, David M., Lehrle, Roy S.

“…A polarising microscope has been used to study the gross homogeneity of a number of polymer blends: PMMA/PαMeSt, PMMA/HDPE, and PMMA/PVC. This technique has…”
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A new approach for measuring the rate of pyrolysis of cross-linked polymers: evaluation of degradation rate constants for cross-linked PMMA by Bate, David M., Lehrle, Roy S.

“…Low molecular weight samples of PMMA have previously been observed to degrade at 400 °C via scission-initiated chain unzip in which the majority of the…”
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The quantitative measurement of the thermal stabilities of low-MW oils by Lehrle, R.S, Pattenden, C.S

“…Measuring the thermal degradation of low-MW oils presents special problems, which can lead to misleading results. In this study of the degradation behaviour of…”
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Effect of gamma irradiation on the MW distribution of polyisobutylene: use of statistical logarithmic plots to assess GPC results by Lehrle, R.S., Pattenden, C.S.

“…GPC data have been examined for three samples of polyisobutylene of different molecular weight (weight averages of 275000, 840000, and 1384000). Corresponding…”
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A new method for using pyrolysis-g.c.-m.s. to study the oxidative degradation of polymers or oils by Bate, David M, Lehrle, Roy S

“…The technique of pyrolysis-g.c.-m.s. has been extended to study oxidative degradation by a method which can deal with all types of samples. The method depends…”
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Kinetic measurements by pyrolysis-gas Chromatography, and examples of their use in deducing mechanisms by Bate, D.M., Lehrle, R.S.

“…A thermocouple feedback-controlled resistive filament pyrolyser has been used to study the kinetics and rates of degradation in two polymer systems. It has…”
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Gamma irradiation of a polyisobutylene rubber: effects on the molecular weight and the subsequent thermal stability by Lehrle, R.S., Pattenden, C.S.

“…Polyisobutylene (PIB) rubber as a 1% solution in methylcyclohexane has been exposed to gamma radiation in a 60Co source. The samples received doses of 8.23 and…”
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Degradation mechanisms of poly(methyl acrylate) — III. An assessment of the participation of secondary reactions from the dependence of pyrolysis yields on sample thickness by Lehrle, R.S., Place, E.J.

“…The thermal degradation of poly(methyl acrylate) (PMA) was studied using pyrolysis gas chromatography (py-gc) with a thermocouple-controlled resistive…”
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