By Edwin J. Vandenberg and Joseph C. Salamone (Eds.)
content material: Catalysis : a key to advances in utilized polymer technological know-how / Edwin J. Vandenberg --
so much complicated magnesium chloride supported Ziegler-Natta catalyst / James C.W. Chien --
Polymerization of C₂-C₆ [alpha]-olefins within the presence of converted Ziegler-Natta catalysts according to titanium halides and organoaluminum sulfates / E. Chiellini, S. D'Antone, R. Solaro, F. Masi, F. Menconi, and L. Barazzoni --
Isotactic olefin polymerization with optically lively catalysts / W. Kaminsky, S. Niedoba, N. Möller-Lindenhof, and O. Rabe --
1-Butene polymerization with ethylenebis-(1-indenyl)zirconium bichloride and methylaluminoxane catalyst procedure : influence of hydrogen addition / M. Kioka, A. Mizuno, T. Tsutsui, and N. Kashiwa --
price of ethylene polymerization with the catalyst approach ([eta]⁵-RC₅H₄)₂ZrCl₂-methylaluminoxane : results of cyclopentadienyl ring substituents / Peter J.T. Tait, Brian L. sales space, and Moses O. Jejelowo --
Migratory nickel(0)-phosphorane catalyst : [alpha]-olefin polymerization via 2, [omega]-linkage / G. Fink, V. Möhring, A. Heinrichs, and Ch. Denger --
constitution and morphology of hugely stereoregular syndiotactic polypropylene produced through homogeneous catalysts / Adam Galambos, Michael Wolkowicz, and Robert Zeigler --
Dicyclopentadiene polymerization utilizing well-characterized tungsten phenoxide complexes / Andrew Bell --
Structural results and reactivity of polymer-bound useful teams : kinetics of nucleophilic displacement reactions on chlorinated polyethers / Douglas A. Wicks and David A. Tirrell --
Mechanism of oxirane coordination polymerization of soluble polynuclear [mu]-oxometal alkoxide aggregates / Ph. Condé, L. Hocks, Ph. Teyssié, and R. Warin --
¹³C NMR research of polyether elastomers / H.N. Cheng --
Calorimetric research of therapy habit of an amine-epoxy resin below ambient stipulations / Suk-fai Lau --
X-ray fiber diffraction research of a man-made analog of cellulose : poly [3,3-bis(hydroxymethyl)oxetane] / J.M. Parris and R.H. Marchessault --
Metalloporphyrin catalysts for keep an eye on of polymerization / Shohei Inoue --
Oligomerization of oxiranes with aluminum complexes as initiators / V. Vincens, A. Le Borgne, and N. Spassky --
Catalysts and initiators for controlling the constitution of polymers with inorganic backbones / Krzysztof Matyjaszewski --
Mechanisms and catalysis in cyclophosphazene polymerization / Harry R. Allcock --
Polyaddition of epoxides and diepoxides to the acids of phosphorus : synthesis of poly(alkylene phosphate)s / S. Penczek, P. Kubisa, P. Klosinski, T. Biela, and A. Nyk --
Poly(methyl methacrylate)-block-polyisobutylene-block-poly(methyl methacrylate) thermoplastic elastomers : synthesis, characterization, and a few mechanical houses / Joseph P. Kennedy and Jack L. Price.
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Extra info for Catalysis in Polymer Synthesis
For instance ball-milling of cMgCl2 with diesters did not produce any beneficial effect. A series of CW type catalysts were prepared by ball-milling of MgCl2 in the presence of dimethyl phthalate, diethyl phthalate, di-/-butyl phthalate, or di-n-butyl phthalate followed by reactions with p-cresol, AIEt3 and T 1 C I 4 . There was no enhancement of either stereospecificity or productivity as compared to the CW-catalyst prepared with ethylbenzoate. The ball-milled product of MgCl2 and di-2-ethylhexyl phthalate was too sticky to be useful for catalyst preparation.
They were used to catalyze the polymerizations of racemic 4-methyl-1-hexene (4MH). Table V shows that the (S) antipode was preferentially polymerized with optical purity Pp » ((100Y)/Y)P/n» where Y is the percent conversion. 03°. 5P ). The CH* and CW* catalysts showed comparable stereoelectivity. In the polymerizations of rac-3MH (3-methyl-1-hexene) and rac-DMO (3,7-dimethyl-1-octene), the (R) antipodes were peferentially polymerized. The stereoelectivities are greater for the 3methyl olefins than for 4MH.
8 mol), reacted again at 110°C for 2 h and hot filtered. Repeated washing with decane and heptane produced the CH-catalyst suspended in 50 mL of heptane. ch002 4 MgCI EHDOP + 2 2 > MgCI DOP + CI TiOC Hi + HCI T1CI4 2 3 8 7 (2) corresponded to > 89% of the EH present. Crystallization of MgCI occured very slowly because of the slow addition of the MgCI adduct at very low temperature and the presence of phthalate esters. 2 2-Ethylhexanol, di-/-butylphthalate, di-octylphthalate. a b c In order to understand the process of the catalyst preparation, the composition of MgCI , and the role played by the ester, we had tried different preparative procedures and characterized the resulting catalysts (Table I).