DIPOLE-MOMENTS OF STYRENE 4-VINYLPYRIDINE COPOLYMERS .1. RELATION TO THE FRACTION OF POLAR COMPONENT

Date

1994-03-01

Author

YILMAZ, E
KUCUKYAVUZ, Z

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

122
views

0
downloads

Mean-square dipole moments for styrene/4-vinylpyridine (S4VP) random copolymers were determined at five different temperatures, 25-60-degrees-C, in 1,4-dioxane solution. The dipole moment behaviour was examined with respect to the increase in mole fraction of the polar monomer, 4-vinylpyridine (4VP), in the copolymer. The behaviour observed was different from the general behaviour of similar copolymers.

Subject Keywords

Polymers and Plastics

URI

https://hdl.handle.net/11511/64848

Journal

POLYMER INTERNATIONAL

DOI

https://doi.org/10.1002/pi.1994.210330301

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

DIPOLE-MOMENTS OF STYRENE/4-VINYLPYRIDINE COPOLYMERS .2. RELATION TO MICROSTRUCTURE YILMAZ, E; KUCUKYAVUZ, Z (Wiley, 1994-04-01) Mean-square dipole moment values of styrene/4-vinylpyridine (S4VP) copolymers determined at 25-60-degrees-C in 1,4-dioxane solutions were related to the microstructure of the chains. Data on the synthesis and dipole moments of S4VP copolymers were used to calculate the distribution of triad fractions and effective dipole moments of styrene, S-centred, and 4-vinylpyridine, V-centred, fractions in the copolymer chains. The relative magnitudes of the effective dipole moment values calculated for each type of t...
TEMPERATURE EFFECTS ON PERMEATION OF MODIFIED ATMOSPHERE GAS-MIXTURES THROUGH A LOW-DENSITY POLYETHYLENE PACKAGE FILM TOKATLI, K; OZILGEN, M (Wiley, 1993-01-01) Permeation of CO2 and O2 through a low density polyethylene film was studied with CO2-N2 MiXtures in the temperature range 263-283 K, and with CO2-O2-N2 mixtures in the range 257-313 K. The temperature dependence of the permeabilities of these gases agreed with the Arrhenius expression. The activation energy for carbon dioxide diffusion was between 3.53 x 10(4) and 3.74 x 10(4) J/mol; the activation energy for oxygen diffusion was 3.13 x 10(4) J/mol. The pre-exponential constant for oxygen was higher than t...
DIPOLE-MOMENTS OF ISOTACTIC AND ATACTIC POLY(PROPYLENE OXIDE) SAMPLES KUCUKYAVUZ, Z; ALYURUK, K; AHMAD, AM (Elsevier BV, 1991-01-01) Dipole moments of poly(propylene oxide) (PPO) samples with different tacticities were determined from dielectric constant and refractive index increment measurements, which were performed on dilute toluene and isooctane solutions. In contrast to previous reports, both refractive index increments and the dipole moment ratios showed a marked dependence on the tacticities of the samples. The dipole moment ratios of isotactic samples were greater than unity and decreased with increasing sequence concentration...
Electrochemical polymerization and characterization of polyether-substituted aniline derivatives Tirkeş, Süha; Oenal, Ahmet M. (Wiley, 2007-08-01) New compounds consisting of aniline units linked by polyether bridges have been synthesized and their electrochemical polymerization was performed via constant potential electrolysis and cyclic voltammetry in an aqueous solution containing 3.0 moI L-1 H2SO4. Chemical polymerization was carried out using (NH4)(2)S2O8 as oxidizing agent. It was found that both methods gave the same polymer product without any cleavage of the polyether bridge between aniline rings. The polymers were characterized using the Fou...
Synthesis and characterization of thiophene functionalized polystyrene copolymers and their electrochemical properties Sahin, E; Camurlu, P; Toppare, Levent Kamil; Mercore, VM; Cianga, I; Yagci, Y (Wiley, 2005-12-01) Thiophene functionalized polystyrene samples (TFPS) were synthesized by atom transfer radical polymerization (ATRP) of styrene, followed by Suzuki coupling with 3-thiophene (Th) boronic acid. Conducting graft polymer of TFPS with thiophene was achieved at 1.5 V in tetrabutylammonium tetrafluoroborate/dichloromethane (TBAFB/DM) by electrochemical methods. Spectroelectrochemical analysis of the resulting copolymers [P(TFPS-co-Th)] reflected electronic transitions at 449, 721 and 880 nm, revealing pi - pi* tra...

Citation Formats

E. YILMAZ and Z. KUCUKYAVUZ, “DIPOLE-MOMENTS OF STYRENE 4-VINYLPYRIDINE COPOLYMERS .1. RELATION TO THE FRACTION OF POLAR COMPONENT,” POLYMER INTERNATIONAL, pp. 237–242, 1994, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64848.