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Tuesday, July 28, 2020 | History

3 edition of Stereospecific polymerization of isoprene found in the catalog.

Stereospecific polymerization of isoprene

Elena Ceauşescu

Stereospecific polymerization of isoprene

by Elena Ceauşescu

  • 154 Want to read
  • 31 Currently reading

Published by Pergamon in Oxford [Oxfordshire], New York .
Written in English

    Subjects:
  • Isoprene.,
  • Polymerization.

  • Edition Notes

    Statementby Elena Ceauşescu.
    Classifications
    LC ClassificationsQD305.H5 C4213 1983
    The Physical Object
    Paginationx, 280 p. ;
    Number of Pages280
    ID Numbers
    Open LibraryOL3497977M
    ISBN 100080299873
    LC Control Number82018096

    adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A.   Assuming only head-to-tail polymerization and cis double-bond opening occurs, give the structure and stereochemical designation of all stereoregular polymers obtainable in principle by stereospecific polymerization of (a) 2-methylbutene, (b) transpentene, (c) isoprene.

    Stereospecific Catalytic Polymerization of α-Olefins α-olefins are often polymerized in the presence of stereospecific catalysts such as metallocenes or Ziegler-Natta catalysts. 1 These catalysts are able to restict the addition of monomer molecules to a specific regular orientation ().In the case of isotactic orientation, all alkyl groups are positioned at the same side of the molecule with. The copolymerization of 4-(N,N-diphenylamino)styrene (DPAS) with isoprene (IP) as catalyzed by the half-sandwich scandium compound (C 5 H 5)Sc(CH 2 C 6 H 4 NMe 2-o) 2 has afforded a new class of amino-functionalized crystalline styrenic thermoplastic homopolymerization of DPAS bearing a sterically demanding diphenylamino group took place in a quasi-living fashion, yielding the.

    The intent of that protective metal structure was to prevent the traffic of the numerous, the rather pied (though mainly in shades of gray) and disorganized tribe of the students irresistibly tempted to abridge their way from the bus station from Witting by penetrating fraudulently into the sacred area of the research on the stereospecific polymerization of isoprene rubber.   Elena Ceauşescu’s research work is translated into English and can be easily found on , world’s largest online shopping site. A new copy of the “Stereospecific Polymerization of Isoprene” by Elena Ceausescu may be purchased at a price of $ However, for low budget holders there are cheaper alternatives.


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Stereospecific polymerization of isoprene by Elena Ceauşescu Download PDF EPUB FB2

Stereospecific Polymerization of Isoprene, a doctoral dissertation by Dr. Elena Ceausescu, is a study of the synthesis of cis-l, 4-polyisoprene rubber, an elastomer of synthetic rubber whose structure and properties are similar to that of natural rubber. Stereospecific Polymerization of Isoprene (English and Romanian Edition) (Romanian) 1st English ed Edition by Elena Ceausescu (Author) ISBN ISBN Why is ISBN important.

ISBN. This bar-code number lets you verify that you're getting exactly the right version or edition of a book. Format: Hardcover. Description Stereospecific Polymerization of Isoprene, a doctoral dissertation by Dr. Elena Ceausescu, is a study of the synthesis of cis-l, 4-polyisoprene rubber, an elastomer of synthetic rubber whose structure and properties are similar to that of natural Edition: 1.

Stereospecific Polymerization of Isoprene - Kindle edition by Elena Ceausescu. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading Stereospecific Polymerization of Isoprene. Stereospecific Polymerization of Isoprene, a doctoral dissertation by Dr.

Elena Ceausescu, is a study of the synthesis of cis-l, 4-polyisoprene rubber, an elastomer of synthetic rubber whose structure and properties are similar to that of natural rubber. This elastomer is primarily used in the manufacture of tires, belts, hoses, matting, flooring, dampeners, and other synthetic rubber goods.

Additional Physical Format: Online version: Ceaușescu, Elena. Stereospecific polymerization of isoprene. Oxford [Oxfordshire] ; New York: Pergamon,   Highly stereospecific polymerization of isoprene was achieved using borohydridoneodymium complexes. In combination with stoichiometric amounts of dialkylmagnesium, Nd(BH 4) 3 (THF) 3 (1) and Cp*‘Nd(BH 4) 2 (THF) 2 (2) (Cp*‘ = C 5 Me 4 n Pr Cited by: The stereospecific polymerization of 1,3-butadiene with Li[Nd(η 3 -C 3H 5) 4 ]dioxane, Li[CpNd(η 3 -C 3H 5) 3 ]2THF, Li[Cp*Nd(η 3 -C 3H 5) 3 ]3DME and (η 3 -C 3H 5) 2Nd(μ-Cl) 2MgCl(THF) as catalysts has been reported.

Complex 1 alone catalyzes the highly 1,4-trans-stereoselective polymerization of isoprene with moderate activity. The addition of ZnEt2 provides an efficient catalytic system for the reversible CCTP of isoprene with retention of the 1,4-trans stereoselectivity.

The ability of rac-[{Me2C(Ind)2}Y(1,3-(SiMe3)2C3H3)] (Ind = 9-indenyl) (1) to catalyze isoprene polymerization, either as a single-site component or in combination with an alkyl–metal as a chain transfer agent (CTA) via coordinative chain transfer polymerization (CCTP), has been investigated.

Complex 1 alone catalyzes the highly 1,4-trans-stereoselective polymerization of isoprene Cited by: Stereospecific polymerization of conjugated dienes, especially 1,3-butadiene and isoprene, is summarized.

Various transition metal catalysts are utilized for the stereospecific polymerization of. Stereospecific Polymerization of Isoprene with Nd(BH4)3(THF)3/MgBu2 as Catalyst. Hard graft: Heterobimetallic peralkylated complexes [Ln{(μ‐R) 2 (AlR 2)} 3 ] (R=Me, Et) can be exploited to study metal‐size effects in “Ziegler Mischkatalysatoren”.Cited by: Lanthanide-based isoprene polymerization catalysts are obtained by the reaction of a lanthanide precursor, selected among readily available carboxylates (versatates), 11 halides, 12,13 or alkoxides, 14 with an Al or Mg co-catalyst.

Trans -sterospecificity is generally related to the use of Nd/Mg. Summary: Stereospecific Polymerization of Isoprene, a doctoral dissertation by Dr. Elena Ceausescu, is a study of the synthesis of cis-l, 4-polyisoprene rubber, an elastomer of synthetic rubber whose structure and properties are similar to that of natural rubber.

The aryldiimine NCN-pincer stabilized neodymium dichloride combined with aluminum alkyls established a new type of homogeneous binary neutral Ziegler-Natta catalyst system. This system exhibited high activity and high cis-1,4 selectivity for the polymerization of isoprene (T p = 20 °C, %; T p = −20 °C, > 99%).

Such catalytic performances remained under a broad range of Cited by: 8. Highlytrans-Stereospecific Isoprene Polymerization by Neodymium Borohydrido Catalysts. Stereoregular Polymers and Stereospecific Polymerizations, Volume 2 covers the reactions and physico-chemical properties of various polymers.

This volume is divided into 88 chapters, and starts with the survey of the molecular structure, stereospecific polymerization, and reaction kinetics of Edition: 1.

Highly trans -Stereospecific Isoprene Polymerization by Neodymium Borohydrido Catalysts † Article in Macromolecules 38(8) April with 59 Reads How we measure 'reads'.

In Situ Modification of Polyisoprene by Organo-Nanoclay during Emulsion Polymerization for Reinforcing Natural Rubber Thin Films. Polymers, 11(8), p Journal. Discover the best Polymerization books and audiobooks.

Learn from Polymerization experts like Elena Ceausescu and Elsevier Books Reference. Read Polymerization books like Stereospecific Polymerization of Isoprene and Computational Quantum Chemistry for free with a free day trial.A series of vanadium complexes bearing iminopyridine bidentate ligands with various electronic and steric properties: V1 [CH2Ph], V2 [CMe2CH2CMe3], V3 [Ph] and V4 [2,6-iPr2Ph] were prepared and characterized by IR spectroscopy and microanalytical analysis.

The catalytic capacity of all the complexes has been investigated for isoprene polymerization and was controlled by tuning the ligand Author: Mengmeng Zhao, Qaiser Mahmood, Chuyang Jing, Liang Wang, Guangqian Zhu, Xianhui Zhang, Qinggang Wang.Chain‐Shuttling Polymerization at Two Different Scandium Sites: Regio‐ and Stereospecific “One‐Pot” Block Copolymerization of Styrene, Isoprene, and Butadiene † Li Pan Organometallic Chemistry Laboratory and Advanced Catalyst Research Team, RIKEN Advanced Science Institute, 2‐1 Hirosawa, Wako, Saitama ‐ (Japan)Cited by: