Materials Literature
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This paper is concerned with the identification of the dynamic moduli of viscoelastic constitutive models on the basis of a nonlinear optimization method by fitting data on carbon black-filled rubber. The models considered can be categorized in two different classes according to the definition of the relaxation functi…
The recently proposed constitutive framework based on logarithmic strain space by Miehe et al. (3) is a successful model for the modelling of amorphous glassy polymers. The modular structure of this model makes it attractive especially for the numerical implementation. In this contribution, the Miehe model will be ada…
ISBN: 978-0-415-68389-0
Abstract Not Provided
In this paper the effects of irradiation on the structures and properties of polysul-fone-polysiloxane multiblock copolymers and its important applied prospects are studied in detail.
An aluminium-substituted framework gallophosphate with occluded triethylamine was synthesized hydrothermally. 27Al MAS NMR spectroscopy indicates that only the tetrahedral coordinated gallium atoms in the gallophosphate are substituted by aluminium atoms. The substitution leads to an evident decrease in cell volume of…
In this paper, four new polymeric thiacrown ethers (PD1-PD4), in which some oxygen atoms of crown ring were replaced by sulfur atoms, with polythiaether backbone were synthesized via the intramolecular cyclization of poly (2'-chloroethyl-2, 3-epithiopropanyl ether) with various dimercaptans. The complexation capacitie…
Calculation of the bonding energy of a molecular orbital for a series of small molecules has been carried out by using ab initio STO-3G method. The results obtained demonstrate that the concept of the molecular orbital bonding energy is applicable for judging whether a molecular orbital is bonding, nonbonding or antib…
Linear absorption and emission spectroscopy of a range of new phenyl ketone derivatives were determined. Two-photon absorption properties have been detected by Ti:sapphire femtosecond laser tuning from 720 nm to 880 nm at intervals of 20 nm. Remarkable electron donor-acceptor group effects on the optical properties of…
Thesis (B.S.)--Armour Institute of Technology; Includes bibliographical references (leaf 49) and index
In nuclear medicine, radiopharmaceuticals are distributed in the body and thus, each organ can deliver a fraction of emitted energy in tissues. Therefore, dose calculations must be assessed accurately and realistically to ensure the patient radiation protection. Absorbed doses were until now based on mathematical stan…
Abstract : SRI International (SRI) has conducted a detailed study of localized hydrocarbon/hydrogen plasmas for the purpose of depositing diamond thin films near atmospheric pressure and at low temperature. A microhollow cathode device was utilized to generate localized plasmas which were characterized spectroscopical…
Six bass, drum 01 (from left to right), fourths and fifths style from B flat, C and G together. Pamberi Steel Orchestra panyard, Santa Cruz Old Road.
A series of polynaphthalsoimides and polynaphthalimides from 1,4,5,8-naphthalene dianhydride and 4,4'-methylene-bis(2,6-diisopropylaniline) or its hydrochloride in HMPA were synthesized in one-step high temperature polycondensation process. The different temperatures of the reaction from 125°C to 180°C were applied. T…
A determinação da viscosidade intrínseca de um biopolímero é parte importante na caracterização reológica de materiais. No caso do biopolímero produzido pelo fungo nativo Botryosphaeria rhodina MMPI, neste trabalho determinou-se valores de viscosidade relativa, específica, reduzida e intrínseca. Parâmetros estes impor…
The effects of deposition conditions (especially lateral position against target during deposition and deposition temperature) on optical properties and structure are presented. The X-ray diffraction (XRD) analysis showed that all the films were polycrystalline with hexagonal structure and preferred orientation in [00…
Minimal energy conformations of amphiphilic monolayers within a microemulsion are investigated. An exploitation of the Euler-Lagrange equations yields the internal forces and torques of the fluid film, which cannot be characterized by a simple surface tension. A numerical scheme reveals various properties of the equil…
The series of inorganic-organic hybrid materials were prepared from silane precursors by the sol-gel process. The resulted perfluorinated organosilicate liquid oligomers were applied on glass substrates and cured by heat yielding hard, clear and well adhering films. The films porosity, water contact angle, refractive…
A new Schiff base ester, 4-({[4-(methylthio)phenyl]methylene}amino)phenyl dodecanoate was synthesized and its IR, 1H NMR, 13C NMR and EI-MS spectroscopic data are presented.
At present, the progress in optics is associated with wide use of diffractive optical elements (DOEs). In this paper we present a DOE design method, which not use computer iterative methods. Starting from the knowledge of the expression of the propagated field on image plane, we use simple formulas to obtain the entir…