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2 result(s) for "Anwar, Syed Mohammad Khurshid"
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Pain, Agony, and Trauma in the Characters of ‘Toba Tek Singh’ and ‘This Blinding Absence of Light’
‘Toba Tek Singh’ is an Urdu Short story written by Saadat Hassan Manto and ‘This Blinding Absence of Light’ is a French Novel Written by Taher Ben Jelloun. ‘Toba Tek Singh’ was perhaps written in 1954 and published in 1955 whereas ‘This Blinding Absence of Light’ was written in 2001. There is more than four decades span between both works of literature. ‘Toba Tek Singh’ is pure fiction but ‘This Blinding Absence of Light’ is although a novel but based on a true story or narration of a prisoner who spent eighteen years of his life in one of the worst prisons of the documented history. ‘Toba Tek Singh’ is written in the third person whereas ‘This Blinding Absence of Light’ is narrated in the first person. This research will be referring here to a 2002 translation of ‘This Blinding Absence of Light’ by Linda Coverdale in English. ‘Toba Tek Singh’ is a fictitious character who is a patient in a lunatic asylum. Before suffering from the mental illness ‘Toba Tek Singh’ was a landlord and during the partition of India, his village and his lands go to a Muslim majority country i.e., Pakistan. This research intends to study the effects of the pain, agony, and trauma on the psyche of the characters here.
Apparent kinetics of nonisothermal high temperature oxidative degradation of ethylene homopolymers: effects of residual catalyst surface chemistry and structure
The effects of two supported residual catalysts—one Ziegler-Natta and another metallocene—on the nonisothermal thermooxidative degradation of the resulting ethylene homopolymers were investigated using TGA experiments and kinetic modeling. The rigorous constitutive kinetic model (developed in this study), unlike the analytical Horowitz and Metzger model, fitted very well to the entire TGA curve, without distribution of activation energy E a , for n (overall degradation order) = 1 for both polymers. Neither n nor E a varied as a function of fractional weight loss of the polymer. Hence, the proposed unified molecular level concept of surface chemistry and structure of the residual catalysts held all through the degradation process. The above feature of n and E a also indicates the suitability of the model formulation and the effectiveness of the parameter-estimation algorithm. Random polymer chain scission, with the cleavage of the −C−C− and the −O−O− (hydroperoxide) bonds, prevailed. The types of residual catalyst surface chemistry and structure varied the bond cleavage process. The metallocene Zr residual catalyst caused more thermooxidative degradation in MetCat HomoPE than what the Ti one did in Z-N HomoPE. The rigorous constitutive model-predicted apparent kinetic energy E a , and frequency factor Z also support this finding. The proposed degradation mechanism suggests that the Zr residual catalyst more (i) decreased the activation energy required to decompose the −C−C− and the −O−O− bonds, and (ii) eliminated β-hydrogen (by the carbonyl functionalities) from the polymer chains. These findings were attributed to the differences in surface chemistry and structure of the residual catalysts. Therefore, the current study presents a rigorous constitutive kinetic model that duly illustrates the influence of the characteristic surface chemistry and structure of the residual catalysts on the high temperature oxidative degradation of polyethylenes.