Polymerization of propylene oxide by the Pruitt-Baggett catalyst

Çolak, Nureddin
Alyürük, Kemal
The Pruitt-Baggett adduct (PBA) which formed from the reaction of FeCl3 with propylene oxide (PO) was hydrolysed in diethyl ether (ether) solutions at different mole ratios. Although the hydrolysates were insoluble in ether they could be converted into PO-soluble form (PBC) by a thermal treatment providing that the r value was kept smaller or equal to unity. PBC polymerized PO concurrently into a mixture of high molecular weight crystalline polymer with low molecular weight non-crystallizable oligomers. The traces catalytic activity shown by PBA substantially enhanced as the hydrolysis ratio r, increased from 0 to 0.5. Although the PBC obtained at r = 0.50 gave maximum yield of polymer, the maximum stereoregular yield (crystalline polymer/oligomer mass ratio) was observed at mole ratio.


Polymerization of propylene oxide and copolymerization of carbon disulphide and propylene oxide with xanthate salts
Aksoy, S.; Balkan, M.; Alyürük, K. (Elsevier BV, 1989-1)
Anionic polymerization of propylene oxide (PO) using several xanthate salts was studied. Low molecular weight oily polymers with variable sulphur content were obtained by using either potassium ethyl xanthate or potassium benzyl xanthate. The highest attainable conversion of PO was limited to ca 10%. The polymerization was accompanied by formation and precipitation of a by-product salt. In the presence of CS2, an oily copolymer with about 40% sulphur was obtained from the above mixtures. In reaction systems...
Polymerization and dipole moment of poly(allyl cyanide)
Küçükyavuz, Zühal; Usanmaz, Ali; Testereci, Şenay (Elsevier BV, 1990-9)
Polymerization of allyl cyanide was carried out by radiation and chemical catalysis. Polymers obtained by γ-rays under various conditions such as in bulk and in the presence of either air or 0.1 mol% ZnCl2 were oily or solid dark-brown products with molecular weights up to 1.4 × 104. The polymers obtained by n-BuLi was a pale-yellow solid, insoluble in common organic solvents and water. No polymer was obtained with BF3O(C2H5)2. The mechanism of polymerization was shown by infra-red investigation to be diffe...
KISAKUREK, D; YIGIT, S (Elsevier BV, 1991-01-01)
Bis(4-bromo-2,6-dichlorophenoxo) ethylenediamine copper(II) complex has been polymerized using electro-initiation by constant potential electrolysis, in dimethylformamide-tetrabutylammonium fluoroborate solvent-supporting electrolyte couple, at room temperature under air or N2. The process leads to low molecular weight (5.6 x 10(3)) linear poly(dichlorophenylene oxide). The structures of the polymers were determined by H-1-NMR and C-13-NMR. The kinetics of the polymerization were followed by in situ cycl...
Electrochemical polymerisation of 2-aminofluorene in ethylalcohol/water medium
Imamoglu, T; Önal, Ahmet Muhtar (Elsevier BV, 2004-08-01)
Electrochemical polymerisation of 2-aminofluorene, 2AF, was investigated in ethylalcohol/water mixture (3:2, v:v) in the presence of HClO4 as the supporting electrolyte via constant potential electrolysis, CPE. Prior to CPE, electrochemical behaviour of the monomer was investigated in the same solvent electrolyte couple utilising cyclic voltammetry, CV. Electrochemical polymerisation of the monomer yielded insoluble, dark bluish-green, conducting polymer deposit on the electrode surface. Characterisation of...
Monomer-bound ion pairs in the stereoregular polymerization of propylene oxide by the Pruitt-Baggett catalyst
Aksoy, S.; Altinok, H.; Tümtürk, H.; Alyürük, K. (Elsevier BV, 1990-6)
The Pruitt-Baggett adduct (PBA) (MW = 438 g mol−1) that formed from the reaction of FeCl3 with propylene oxide (PO) was hydrolysed in diethyl ether (ether) solutions at different molar ratios. The hydrolysates (), which were insoluble in ether, could be converted into catalytically active form () by a thermal treatment. was soluble in etheric solvents and in pyridine. These solutions, in contrast to PBA and , were electrical conductors. Profound differences in the electrical conductivity of was observed ...
Citation Formats
N. Çolak and K. Alyürük, “Polymerization of propylene oxide by the Pruitt-Baggett catalyst,” Polymer, pp. 1709–1713, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52200.