POLYMERIZATION OF MONOISOCYANATES BY THE PRUITT-BAGGETT ADDUCT

Date

1993-12-01

Author

YILMAZ, O
Usanmaz, Ali
ALYURUK, K

Metadata

Show full item record

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

Item Usage Stats

79
views

0
downloads

n-Butyl isocyanate (nBIC) was polymerized in bulk by the Pruitt-Baggett adduct (PBA) at -23, 0.0, and 25.0-degrees-C. Polymerization was accompanied by trimerization to the cyclic isocyanurates at all temperatures. Spectroscopic evidences supported the nylon-1 structure for both trimer and polymer. The polymer /trimer ratio and the molecular weight of produced polymers were found to increase with decreasing temperature. The Pruitt-Baggett catalyst (PBC), which is the reaction product of (PBA + H2O) system, also polymerized nBIC, but with a relatively slower rate. In aromatic and etheric solutions, nBIC was only trimerized by PBA. Copolymerization of nBIC with propylene oxide by PBA and PBC failed. Some selected monoisocyanates were also polymerized by PBA. (C) 1993 John Wiley & Sons, Inc.

Subject Keywords

Organic Chemistry, Materials Chemistry, Polymers and Plastics

URI

https://hdl.handle.net/11511/51666

Journal

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

DOI

https://doi.org/10.1002/pola.1993.080311306

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Polymerization of propylene oxide by the Pruitt-Baggett catalyst Çolak, Nureddin; Alyürük, Kemal (Elsevier BV, 1989-9) 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. Th...
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 ...
POLYMERIZATION OF BIS(4-BROMO-2,6-DICHLOROPHENOXO) ETHYLENEDIAMINE COPPER(II) COMPLEX BY ELECTRO-INITIATION 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...
Crosslinked polymer gels for boron extraction derived from N-glucidol-N-methyl-2-hydroxypropyl methacrylate Bicak, N; Ozbelge, HO; Yılmaz, Levent; Senkal, BF (Wiley, 2000-03-24) Glycidyl methacrylate was reacted in 2-methyl pyrrolidone solution with N-methyl-D-glucamine (NMG) to produce N-D-glucidol, N-methyl-2-hydroxy propyl methacrylate (GMHP). The reaction proceeded exclusively via ring opening of the oxirane. The resulting vinyl monomer was a waxy product and soluble in water, ethanol, methanol, DMF, and NMP. Copolymerization of GMHP with N,N'-tetraallyl piperazinium dichloride by the inverse suspension method (water in oil), using a toluene/chloroform (3:1) mixture as continuo...
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...

Citation Formats

O. YILMAZ, A. Usanmaz, and K. ALYURUK, “POLYMERIZATION OF MONOISOCYANATES BY THE PRUITT-BAGGETT ADDUCT,” JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, pp. 3205–3211, 1993, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51666.