Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Pyrolysis mass spectrometric analysis of styrene-butadiene block and random copolymers
Download
index.pdf
Date
1997-01-01
Author
Hacaloğlu, Jale
Ertugrul, Nergis
Fares, Muhammed M.
Suzer, Sefik
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
158
views
0
downloads
Cite This
rect pyrolysis mass spectrometric analysis of a styrene-butadiene-styrene block copolymer indicated that thermal decomposition of each block shows a resemblance to the related homopolymer, giving a possibility of differentiation of blocks. However, the random analog, the styrene butadiene rubber, degraded in a manner that is somewhat in between in nature of the thermal characteristics of both homopolymers. This technique shows promise to differentiate thermal behaviors of each sequence in block polymers if any exist. Indirect pyrolysis mass spectrometric analysis gave no clear evidence for differentiation of the nature and the composition of the copolymers.
Subject Keywords
Thermal-degradation
,
Inert atmosphere
,
Evolved-gas
,
Polybutadiene
,
Polystyrene
,
Polymers
,
Chromatography
,
Behavior
URI
https://hdl.handle.net/11511/30375
Journal
European Polymer Journal
DOI
https://doi.org/10.1016/s0014-3057(96)00068-7
Collections
Graduate School of Natural and Applied Sciences, Article
Suggestions
OpenMETU
Core
Pyrolysis mass spectrometry analysis of electrochemically grafted polyacrylonitrile with thiophene
Oguz, Gulcan; Hacaloğlu, Jale; Önal, Ahmet Muhtar (2005-10-01)
In this work, structural and thermal analyses of a polythiophene/polyacrylonitrile (PTh/PAN) sample, prepared by electrochemical polymerization of thiophene onto a poly(acrylonitrile) coated anode, have been performed by a direct insertion probe pyrolysis mass spectrometry technique. The evolution profiles of PTh based products from PTh/PAN showed nearly identical trends with those recorded during the pyrolysis of pure PTh. However, when PAN based products were considered, contrary to the trends observed fo...
Pyrolysis mass spectrometric analysis of copolymer of polyacrylonitrile and polythiophene
Oğuz, Gülcan; Hacaloğlu, Jale; Department of Polymer Science and Technology (2004)
In the first part of this work, the structural and thermal characteristics of polyacrylonitrile, polyacrylonitrile films treated under the electrolysis conditions in the absence of thiophene, polythiophene and the mechanical mixture and a conducting copolymer of polyacrylonitrile/polythiophene have been studied by pyrolysis mass spectrometry technique. The thermal degradation of polyacrylonitrile occurs in three steps; evolution of HCN, monomer, low molecular weight oligomers due to random chain cleavages a...
Pyrolysis mass spectrometry analysis of BF4 - doped polythiophene
Gozet, Tuba; Hacaloğlu, Jale; Önal, Ahmet Muhtar (2004-06-01)
Pyrolysis of electrochemically prepared BF4- doped polythiophene (PTh) by direct insertion probe and Currie point pyrolysis gas chromatography mass spectrometry techniques indicated that thermal decomposition of PTh occurs in two steps. In accordance with literature results, the first step is assigned to the loss of the dopant, and the second step to the degradation of the polymer backbone producing segments of various conjugation lengths. At elevated temperatures, detection of products such as H2S and C2H2...
alpha-Tricalcium phosphate hydrolysis to hydroxyapatite at and near physiological temperature
Durucan, Caner (2000-06-01)
The kinetics of hydroxyapatite (HAp) formation by direct hydrolysis of alpha-tricalcium phosphate (alpha-TCP) [alpha-Ca-3(PO4)(2)] have been investigated. Transformation kinetics were examined for reactions at 37 degrees C, 45 degrees C and 56 degrees C by isothermal calorimetric analysis. Setting times and morphologies of the resultant HAp were found to be strongly dependent on reaction temperature. XRD analysis accompanied by FTIR confirmed that phase pure calcium-deficient hydroxyapatite (CDHAp) [Ca10-x(...
THERMAL POLYMERIZATION OF BIS(TRIHALOPHENOXO)COPPER(II) COMPLEXES IN EXCESS DIMETHYLFORMAMIDE AND DIMETHYL-SULFOXIDE AS LIGANDS
KISAKUREK, D; SANLI, O (1989-08-01)
Thermal decomposition of bis(trihalophenoxo)copper(II) complexes was achieved at 50°C in dimethylformamide or dimethyl sulfoxide. The resulting polymers, poly(oxydihalophenylene)s (2), were characterized by FTIR, 1H NMR and 13C NMR spectroscopy and by differential scanning calorimetry. The molecular weights were determined by the vapour pressure method. Tribrominated phenol derivatives prefer 1,4‐substitution, whereas with trichlorophenol derivatives 1,2‐and 1,4‐substitutions take place at equal rates in ei...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
J. Hacaloğlu, N. Ertugrul, M. M. Fares, and S. Suzer, “Pyrolysis mass spectrometric analysis of styrene-butadiene block and random copolymers,”
European Polymer Journal
, pp. 199–203, 1997, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30375.