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Ahmed K.,Applied Chemistry Research Center Laboratories Complex
Journal of Materials and Environmental Science | Year: 2014

This article emphasizes the effect of industrial waste such as marble sludge (MS) on high density polyethylene (HDPE) composites. Marble Sludge (MS) was first dried, ground and passed through 63, 125 and 250 μm sieves to obtain desiring particle sizes. Chemical composition of MS powder was determined by XRF-fluorescence spectrometer. By incorporating MS the toughness of matrix is enhanced thereby making the composite suitable for more strategic engineering applications. HDPE melted compound with different compositions and particle sizes of MS. The effects of MS content and particle sizes in the composite on MFI, density, mechanical, and barrier properties are investigated. Reinforcement with MS proved to enhance the mechanical properties of the composites. All mechanical properties of 63 μm size MS particle filled HDPE composites having improved value than other particle sizes. Source


Arshad M.N.,University of Gujrat | Khan I.U.,The University of Lahore | Zia-Ur-Rehman M.,Applied Chemistry Research Center Laboratories Complex | Danish M.,University of Gujrat | Holman K.T.,Georgetown University
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title compound, C14H15NO5S, the thiazine ring adopts a sofa conformation and an intramolecular O - H⋯O hydrogen bond forms an S(6) ring. In the crystal, molecules are linked viaC - H⋯O interactions. Source


Arshad M.N.,King Abdulaziz University | Sahin O.,Sinop University | Zia-Ur-Rehman M.,Applied Chemistry Research Center Laboratories Complex | Shafiq M.,The University of Faisalabad | And 4 more authors.
Journal of Chemical Crystallography | Year: 2013

Methyl 3-hydroxy-2-methyl-1,1,4-trioxo-1,2,3,4-tetrahydro- 1λ6-benzo[e][1,2]thiazine-3-carboxylate was synthesized in single step through in situ bromination of methyl 2-methyl-1,1,4-trioxo-1,2,3,4- tetrahydro-1λ6-benzo[e][1,2]thiazine-3-carboxylate using dibenzoyl peroxide & N-bromosuccinamide and was crystallized in acetone-ethyl acetate mixture (1:1). However, crystallization in methanol converted the title compound to methyl 3-methoxy-2-methyl-1,1,4-trioxo-1,2,3,4- tetrahydro-1λ6-benzo[e][1,2]thiazine-3-carboxylate, an unsymmetrical ether. The titled compound C11H11NO6S (3) crystallized in nonoclinic space group P21/c whereas, the compound C12H13NO6S (4) crystallized in triclinic space group P-1. X-ray studies shows that the molecules of 1 are linked into a one-dimensional framework structure by C-H···O and O-H···O hydrogen bonds, while in 4, intermolecular C-H···O and C- H···π hydrogen bonds and a π··· π interaction result in the formation of infinite chains running along the [010] and [001] directions. Graphical Abstract: [Figure not available: see fulltext.] © 2013 Springer Science+Business Media New York. Source


Ahmed K.,Applied Chemistry Research Center Laboratories Complex | Nasir M.,University of Karachi | Imran A.,Textile Institute of Pakistan | Mahmood K.,Applied Chemistry Research Center Laboratories Complex
Journal of Materials and Environmental Science | Year: 2014

The effect of reinforcing natural rubber (NR) with industrial and agricultural waste, Marble Waste (MW)/Rice Husk derived Silica (RHS), hybrid filler on the cure characteristics, mechanical and swelling properties of the hybrid composite was investigated. Hybrid fillers were treated with silane (Si-69) as a coupling agent to enhance their dispersion property in NR matrix. This study has shown the intrinsic potential of MW/RHS as reinforcing filler revealed by the considerable improvement in mechanical properties of the NR hybrid composites. The results indicated that scorch time, cure time and elongation at break decreased but torque, tensile strength, modulus, tear strength and hardness increased. The homogenous dispersion of MW/RHS obtained with silane (Si-69) coupling agent is accountable for the substantial enhancement in the tensile strength, tear strength, modulus and hardness of NR hybrid composite. This study suggests that the use of industrial and agricultural waste in NR hybrid composite is a cost effective and smart substitute of industrial interest. Additional inducement was the social responsibility of tackling with environmental issues of both industrial and agricultural waste. Source

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