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
AN EXPERIMENTAL INVESTIGATION OF POLYVINYL-CHLORIDE) EMULSION POLYMERIZATION - EFFECT OF INITIATOR AND EMULSIFIER CONCENTRATIONS ON POLYMERIZATION KINETICS AND PRODUCT PARTICLE-SIZE
Date
1989-01-01
Author
Karakaş, Gürkan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
318
views
0
downloads
Cite This
Effects of concentration changes in initiator species Na2SO3, (NH4)2S2O8 and CuSO4, and emulsifier, ammonium stearate, on poly(vinyl chloride) (PVC) emulsion polymerization kinetics and on product particle size were experimentally investigated. It was observed that to obtain industrially significant rates and overall conversions, not only an optimum concentration ratio of Na2SO3/(NH4)2S2O8/CuSO 4 must be used, but also the concentrations of these species must be above certain limits. Increasing the concentration of the emulsifier used did not influence the rate of polymerization, but led to increases in limiting conversions. Product particle size analyses indicate that average particle size is independent of initiator concentration and rate of initiation. An increase in the emulsifier concentration on the other hand appears to lead to an increase in number of particles in the system and thus promotes smaller particle sizes.
Subject Keywords
General Engineering
,
General Materials Science
URI
https://hdl.handle.net/11511/40417
Journal
BRITISH POLYMER JOURNAL
DOI
https://doi.org/10.1002/pi.4980210508
Collections
Department of Chemical Engineering, Article
Suggestions
OpenMETU
Core
A new method for processing of monazite and examination of the products by X-ray analysis
Kizilyalli, Meral; Welch, Alastair J. (Elsevier BV, 1987-1)
Sintering reactions of lanthanide orthophosphates with Na2CO3 gave the expected products (Na3PO4 and Ln2O3) with stoichiometric amounts of Na2CO3. When less than the theoretical amounts of Na2CO3 were used, two intermediate products eventually characterized by X-ray diffraction as Na3Ln(PO4)2 and Ln3PO7 were detected. Application of the sintering method to naturally occurring phosphates, particularly the mineral monazite, proved to be very successful. By using the optimum amount of Na2CO3 to form Na3Ln(PO4)...
A novel experimental and density functional theory study on palladium and nitrogen doped few layer graphene surface towards glucose adsorption and electrooxidation
Caglar, Aykut; Duzenli, Derya; Önal, Işık; Tezsevin, Ilker; Sahin, Ozlem; Demir Kıvrak, Hilal (Elsevier BV, 2021-03-01)
At present, few layer graphene (G) and nitrogen doped few layer graphene (N doped-G) are firstly coated on Cu foil via chemical vapor deposition (CVD) method and G and N doped-G coated Cu foil is transferred to the indium tin oxide (ITO) substrate surface to obtain electrodes. Pd metal is electrodeposited onto the N doped-G/ITO electrode (Pd-N doped-G/ITO). Pd-N doped-G/ITO electrode are characterized with advanced surface characterization methods such as Raman spectroscopy and SEM-EDX. Characterization res...
DSC STUDIES ON MELT CRYSTALLIZED, DRAWN AND FUMING NITRIC-ACID OXIDIZED POLYETHYLENE
Akar, Ahmet; Zaim, Ömer; Tinçer, Teoman; Aydoğan, A. Cevdet (Wiley, 1989-4)
Melting, recrystallisation and remelting of undrawn and drawn linear polyethylene with different molecular weight were studied by differential scanning calorimetry before and after oxidation with nitric acid.
Theoretical and experimental considerations on poly(dihalophenylene oxide)s
Kisakürek, Duygu (Wiley, 1988)
The decomposition of copper(II) trihalophenoxides in acetonitrile yields poly(dihalophenylene oxide)s. A 1H n.m.r. study has shown that a bromine atom in the 4‐position of the trihalophenoxides results in polymers having higher linearity. Various dynamic and static methods, within the framework of Hückel molecular orbital theory, have been used to explain the product distribution.
PREPARATION OF BLOCK-COPOLYMERS WITH MACROAZONITRILES AS THE INITIATOR
YURUK, H; ULUPINAR, S (Wiley, 1993-12-01)
Block copolymers containing poly(ethylene oxide) or poly(propylene oxide) prepolymer segments and methyl methacrylate were prepared. A stepwise procedure was first employed to prepare macro-azocarbamates by capping hydroxy-terminated poly(ethylene oxide) or poly(propylene oxide) with 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate and subsequently reacting this intermediate with 4,4'-azobis(4-cyano-n-pentanol)**. The resulting polymeric azocarbamates were used as free-radical initiators for the poly...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. Karakaş, “AN EXPERIMENTAL INVESTIGATION OF POLYVINYL-CHLORIDE) EMULSION POLYMERIZATION - EFFECT OF INITIATOR AND EMULSIFIER CONCENTRATIONS ON POLYMERIZATION KINETICS AND PRODUCT PARTICLE-SIZE,”
BRITISH POLYMER JOURNAL
, pp. 399–406, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40417.