Document Detail

Control of polymer topology by chain-walking catalysts.
MedLine Citation:
PMID:  12203338     Owner:  NLM     Status:  MEDLINE    
Chain-walking catalysts are demonstrated to control the branching topology of polyethylene by tuning the competition between monomer insertion and chain isomerization (walking). The topology of the polyethylene was controlled from linear with moderate branching to hyperbranched to dendritic. Although overall branching number and distribution of short chain branching are relatively constant, the topology of the polyethylene changes from linear polyethylene with moderate branches at high ethylene pressures to a dendritic polyethylene at low pressures. This provides a straightforward one-pot process for making polymers with a full range of tunable topologies.
Zhibin Guan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Review    
Journal Detail:
Title:  Chemistry (Weinheim an der Bergstrasse, Germany)     Volume:  8     ISSN:  0947-6539     ISO Abbreviation:  Chemistry     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-08-30     Completed Date:  2003-08-08     Revised Date:  2009-08-04    
Medline Journal Info:
Nlm Unique ID:  9513783     Medline TA:  Chemistry     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  3086-92     Citation Subset:  IM    
Department of Chemistry, 516 Rowland Hall, University of California, Irvine, California 92697-2025, USA.
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MeSH Terms
Combinatorial Chemistry Techniques / methods*
Polyenes / chemical synthesis
Polymers / chemical synthesis*
Transition Elements / chemistry
Reg. No./Substance:
0/Polyenes; 0/Polymers; 0/Transition Elements; 83136-87-2/PL 732

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