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Chain Transfer Agents for Living Ring-Opening Metathesis Polymerization Reactionsof Norbornene

机译：用于活性开环易位聚合反应的链转移剂降冰片烯

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The norbornadiene dimer, exo-trans-exo pentacyclo (8.2.1.14.7.02,9.03.8)tetradeca-5,11-diene (1) can be used in living ring-opening metathesis polymerization as a cross linking reagent for the controlled synthesis of star-shaped polymers. Star polymers are formed when a few equivalents of 1 are added to living polynorbornene initiated with W(CHR)(NAr)(O-t-Bu)2 or Mo(CHR)(NAr)(O-t-Bu)2. Addition of 1 to the initiators first followed by addition of norbornene results in formation of a gel. The reactivity of the living alkylidene plays an important role in determining star formation and certain functionalized polymers such as 2,3-dicarbomethoxynorbornadiene can form star copolymers quantitatively only when several equivalents of norbornene are added to the living polymer before 1 is added. Keywords: Metathesis polymerization, Polymers, Norbornene, Chain transfer agents, Alkylidene, Molybdenum. (jes)

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Crowe, W. E.; Mitchell, J. P.; Gibson, V. C.; Schrock, R. R.;
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年度 1990
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总页数 7
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Copolymers; Polymerization; Chains; Chemical agents; Chemical reactions; Control; Cyclic compounds; Dimers; Molybdenum; Pentadienes; Polymers; Reactivities; Stars; Stellar evolution; Synthesis; Transfer; Reprints;

机译：共聚物;聚合;链;化学试剂;化学反应;对照;环状化合物;二聚体;钼;戊二烯;聚合物;反应活性;恒星;恒星演化;合成;转移;重印;

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1. Ring-opening metathesis polymerization using alkenyl sulfides as chain-transfer agents: Efficient routes to unsymmetrical poly(norbornene)-based macroinitiators bearing a terminal hydroxy group [J] . Katayama H., Fukuse Y., Nobuto Y., Macromolecules . 2003,第19期

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2. MOLECULAR WEIGHT DISTRIBUTION OF LIVING POLYMERIZATION INVOLVING CHAIN-TRANSFER AGENTS - COMPUTATIONAL RESULTS, ANALYTICAL SOLUTIONS, AND EXPERIMENTAL INVESTIGATIONS USING RING-OPENING METATHESIS POLYMERIZATION [J] . Benedicto AD., Grubbs RH., Claverie JP. Macromolecules . 1995,第2期

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3. Difluoroethylene as a chain transfer agent ring-opening metathesis polymerization (ROMP) during of norbornene by a ruthenium alkylidene complex: A computational study [J] . Fomine S, Ortega JV, Tlenkopatchev MA Journal of Organometallic Chemistry . 2006,第15期

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4. Living Ring-Opening Metathesis Polymerization of Doubly Polar Norbornene Derivatives Initiated by Ruthenium Carbene Complexes [C] . Yasushi Nishihara, Yoshiaki Inoue, Kentaro Takagi Symposium on Organometallic Chemistry . 2006

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5. Polymer-based nanostructures for the targeted delivery of bioactive agents from ring-opening metathesis polymerization. [D] . Bertin, Paul Anthony. 2005

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7. Ring-Opening Metathesis Polymerizations in d-Limonene: A Renewable Polymerization Solvent and Chain Transfer Agent for the Synthesis of Alkene Macromonomers [O] . -1

机译：D-柠檬烯的开环复分解聚合：可再生聚合溶剂和链转移剂，用于合成烯烃大分子单体

Chain Transfer Agents for Living Ring-Opening Metathesis Polymerization Reactionsof Norbornene

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