@article { ISI:000239536200026,
	title = {Stabilization of gamma-sterilized biomedical polyolefins by synergistic mixtures of oligomeric stabilizers},
	journal = {Polymer Degradation and Stability},
	volume = {91},
	number = {10},
	year = {2006},
	month = {OCT},
	pages = {2451-2464},
	publisher = {ELSEVIER SCI LTD},
	type = {Article},
	address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND},
	abstract = {<p>The stabilization of polyolefins against gamma-sterilization has been studied with single or binary additive system. The present attempt is to utilize synergistic mixtures of stabilizers which are approved for food contact applications. Ethylene-propylene (EP) copolymer has been melt-mixed with hindered amine stabilizers (HAS), phenolic antioxidants and organo-phosphites (hydroperoxide decomposer). Samples were sterilized with different doses of gamma-radiation. Stabilization was characterized in terms of changes in the functional groups (oxidation products), tensile properties, yellowing and surface morphology by FTIR spectroscopy, Instron, colorimetry (reflectance) and scanning electron microscopy (SEM), respectively. Results were discussed by comparing the stabilizing efficiency of mixtures with and without phenol system. Among phenol containing systems, where we mostly observe discoloration due to the oxidation of hindered phenol and the combination of secondary HAS, tertiary HAS, organo-phosphite and hindered phenol exhibited improved stabilization efficiency than single or binary additive systems. The mixture of secondary HAS and tertiary HAS, has shown antagonistic effect of stabilization whereas their combination with organo-phosphite has exhibited synergistic effect of stabilization even at higher doses of gamma-sterilization. The effects have been explained through the interaction between the stabilizers. (c) 2006 Elsevier Ltd. All rights reserved.</p>},
	keywords = {Antioxidants, discoloration, ethylene-propylene copolymer, gamma-sterilization, stabilization, tensile properties},
	issn = {0141-3910},
	doi = {10.1016/j.polymdegradstab.2006.03.010},
	author = {Alariqi, Sameh A. S. and Kumar, A. Pratheep and Rao, B. S. M. and Tevtia, Amit K. and Singh, R. P.}
}
@article {34},
	title = {Stabilization of gamma-sterilized biomedical polyolefins by synergistic mixtures of oligomeric stabilizers. part II. polypropylene matrix},
	journal = {Polymer Degradation and Stability},
	volume = {92},
	number = {2},
	year = {2007},
	month = {FEB},
	pages = {299-309},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	keywords = {Ceramics, Chemical synthesis, Electron microscopy, Oxides, X-ray diffraction},
	issn = {0167-577X},
	author = {Alariqi, Sameh A. S. and Kumar, A. Pratheep and Rao, B. S. M. and Singh, R. P.}
}
@article { ISI:000207804200008,
	title = {Single step synthesis and properties of M/MFe2O4 and PVDF/M/MFe2O4 (M = Co, Ni) magnetic nanocomposites},
	journal = {Science of Advanced Materials},
	volume = {1},
	number = {3},
	year = {2009},
	month = {DEC},
	pages = {262-268},
	publisher = {AMER SCIENTIFIC PUBLISHERS},
	address = {26650 THE OLD RD, STE 208, VALENCIA, CA 91381-0751 USA},
	abstract = {<p>Metal/ferrite nanocomposites (M/MFe2O4; M = Co, Ni), consisting of nanoparticles of a metal and the corresponding metal ferrite, have been synthesized under in situ conditions by a simple and single step process. The metal/ferrite nanocomposites embedded in a polymer matrix have been prepared by a simple hot-pressing method. The performance parameters such as magnetization, coercivity, permeability and dielectric constant of the two- and three-phase nanocomposite systems are compared. The coercivity increases and the permeability decreases with increasing polymer content in the three-phase composite. Enhancement of the dielectric constant is observed at low frequencies.</p>},
	keywords = {Dielectric, Ferrite, magnetic properties, Nanocomposite, Nanocrystalline, permeability},
	issn = {1947-2935},
	doi = {10.1166/sam.2009.1053},
	author = {Deka, Sasanka and Joy, Pattayil Alias and Kumar, A. Pratheep}
}
