Polymerization of vinylcyclohexane with TiCl 3 –Al(C 2 H 5 ) 3 catalysts
dc.contributor.author | McCarty, W. H. | en_US |
dc.contributor.author | Parravano, Guiseppe | en_US |
dc.date.accessioned | 2006-04-28T18:14:20Z | |
dc.date.available | 2006-04-28T18:14:20Z | |
dc.date.issued | 1965-12 | en_US |
dc.identifier.citation | McCarty, W. H.; Parravano, G. (1965)."Polymerization of vinylcyclohexane with TiCl 3 –Al(C 2 H 5 ) 3 catalysts." Journal of Polymer Science Part A: General Papers 3(12): 4029-4046. <http://hdl.handle.net/2027.42/38746> | en_US |
dc.identifier.issn | 0449-2951 | en_US |
dc.identifier.issn | 1542-6246 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/38746 | |
dc.description.abstract | The polymerization of vinylcyclohexane was followed dilatometrically in cyclohexane and n -heptane solvents with TiCl 3 –Al(C 2 H 5 ) 3 as catalyst. In n -heptane constant rates were obtained, while in cyclohexane a slow change of the initial rate to a lower steady-state value was found. Polymerization rates were first order to [TiCl 3 ] and [monomer] for concentrations >0.80 mole/l., and second order for monomer concentrations <0.80 mole/l. The rate was highest at [Al(C 2 H 5 ) 3 ] 0.005 mole/l. (Al/Ti = 0.28). Polymer intrinsic viscosity increased with time, with increasing monomer concentration, and with decreasing temperature. It was independent of [Al(C 2 H 5 ) 3 ]. A kinetic model which can account for these observations involves the alkylation of the TiCl 3 surface by reaction with Al(C 2 H 5 ) 3 as the site-generating step. It is also suggested that monomer molecules partake in the site-generating step by reaction with the partially reduced TiCl 3 surface. This possibility demands a rate of polymerization dependent upon the monomer concentration to a power between 1 and 2. The lower the liquid phase monomer concentration the higher the exponent of the monomer concentration in the rate expression. The melting point of the polymer was 280–285°C. The solubility of polyvinylcyclohexane was investigated for fifteen paraffinic and aromatic hydrocarbons. Only two polymer fractions exhibited amorphous x-ray spectra, and both of these occurred at [Al(C 2 H 5 ) 3 ] 0.005 mole/l. The rate of polymerization of vinylcyclohexane is compared with that of propylene, pentene-1, and stryrene on similar catalyst. | en_US |
dc.format.extent | 971642 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | John Wiley & Sons, Inc. | en_US |
dc.subject.other | Chemistry | en_US |
dc.subject.other | Polymer and Materials Science | en_US |
dc.title | Polymerization of vinylcyclohexane with TiCl 3 –Al(C 2 H 5 ) 3 catalysts | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Chemical Engineering | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemical and Metallurgical Engineering, University of Michigan, Ann Arbor, Michigan | en_US |
dc.contributor.affiliationum | Department of Chemical and Metallurgical Engineering, University of Michigan, Ann Arbor, Michigan | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/38746/1/100031203_ftp.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1002/pol.1965.100031203 | en_US |
dc.identifier.source | Journal of Polymer Science Part A: General Papers | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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