Polymer Bulletin
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Field-dependent drift mobility of carriers in polycrystalline aromatic hydrocarbon layers
Polymer Bulletin - Tập 8 - Trang 95-99 - 1982
It was found that the drift mobility of carriers in tetracene and p-quaterphenyl polycrystalline layers is dependent on electric field. A simple model to explain the dependence is presented in this paper.
Quasielastic light scattering from semidilute solutions in θ-solvent: Distribution functions of decay times
Polymer Bulletin - Tập 16 Số 1 - Trang 67-73 - 1986
The possibility of studying thermal motion correlation by multiple pulse NMR
Polymer Bulletin - Tập 5 - Trang 347-354 - 1981
We present the results of a calculation of the spin-lattice and spin-spin relaxation for dipolar solid when it is irradiated by the WAHUHA and MREV-8 pulse sequences. The spin-spin relaxation rate which is determined by the second-order dipolar interaction term of the average Hamiltonian depends on thermal motion of four atoms. It has been shown that from the temperature dependence of this relaxat...... hiện toàn bộ
A comparative study based on molecular structure, spectroscopic, electronic, thermodynamic and NBO analysis of some nitrogen-containing monomers
Polymer Bulletin - Tập 78 - Trang 663-693 - 2020
This paper describes the theoretical comparison of the reactivity as comonomers of some nitrogen-containing monomers. Theoretical calculations of monomers commonly used as comonomer in preparation of micro- or nano-gels were carried out by using CAM-B3LYP/6-31+G and B3LYP/6-311G+ (d,p) basis sets of density functional theory. The vibrational frequencies and chemical shifts were calculated by both ...... hiện toàn bộ
Proton conducting properties of ionically cross-linked poly(1-vinyl-1,2,4 triazole) and poly(2-acrylamido-2-methyl-1-propanesulfonic acid) electrolytes
Polymer Bulletin - Tập 66 - Trang 1099-1110 - 2010
The synthesis and thermal as well as proton conducting properties of complex polymer electrolytes based on poly(2-acrylamido-2-methyl-1-propanesulfonic acid) PAMPS and poly(1-vinyl-1,2,4-triazole) PVTri were investigated. The materials were produced by complexation of PAMPS with PVTri at various compositions to get PVTriP(AMPS)
x
where x is the molar ratio of the...... hiện toàn bộ
Polymers from Reissert compounds
Polymer Bulletin - Tập 25 - Trang 17-24 - 1991
A series of new polymers have been synthesized by condensation of the dianions of acyclic bis(Reissert compounds) (A-A dinucleophile) with dihaloalkanes (B-B dielectrophile). These thermoplastic polyamides (10) are soluble in a wide range of solvents including THF, CHCl3, DMF, NMP, etc. Intrinsic viscosities vary between 0.07 and 0.48dL/g. The Tg's vary from 72°C to 116°C, depending upon the space...... hiện toàn bộ
Density functional theory calculations on the grafting copolymerization of 2-substituted aniline onto chitosan
Polymer Bulletin - Tập 77 - Trang 6391-6407 - 2019
Chitosan is a biodegradable natural polymer which is safe and non-toxic and used in different applications. Grafting of chitosan with aniline derivatives is an important route to improve its properties. Chitosan has different active groups that can be blocked in the grafting process, which could be confirmed by calculation studies. The author thinks that the confirmation of chitosan active group i...... hiện toàn bộ
Morphological and rheological detection of the phase inversion of PMMA/PS polymer blends
Polymer Bulletin - - 1998
Enzymatic synthesis of polyguaiacol and its thermal antioxidant behavior in polypropylene
Polymer Bulletin - Tập 73 - Trang 1343-1359 - 2015
Polyguaiacol was successfully synthesized by enzyme-catalyzed polymerization in an aqueous micelle system with horseradish peroxidase (HRP) as the catalyst. As-synthesized polyguaiacol was characterized by infrared spectrometry and gel permeation chromatography, and its thermal stability was evaluated by thermogravimetric analysis. Besides, the thermal antioxidant behavior of the as-synthesized ph...... hiện toàn bộ
Evaluation of the effect of magnetic nanoparticles on extraction of genomic DNA of Escherichia coli
Polymer Bulletin - Tập 80 Số 3 - Trang 3153-3163 - 2023
The initial step in molecular biology and genetic engineering fields are the finding of optimal methods for the extraction of the genomic DNA from microorganisms and cells. There are several methods for the extraction of bacterial DNA and the use of magnetic nanoparticles is a novel method for the isolation of nucleic acid. In the present study, the synthesized magnetic nanoparticles were used to ...... hiện toàn bộ
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