ISSN:
0959-8103
Keywords:
anionic polymerization
;
functionalization
;
polystyryl lithium
;
polybutadienyl lithium
;
chain-end polystyrene
;
characterization
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The transformation of living polymer chain-ends is particularly well-suited to synthesize end-functionalized polymers. Herein, the development of a recent synthetic methodology is reported. High degrees of functionalization are obtained using alkyl chlorides bearing heteroatoms as functionalization agents. A mechanism involving complexation of the lithium counterion by the heteroatom of the reagent is proposed, based on the role of the heteroatom, the chloroalkyl derivative structure, and data reported in recent publications. Thus, ω-functional polymers have been prepared by reacting the corresponding living anionic polymers with a chloroacetal, a chloroether and a dichloroether. The products have been characterized by size-exclusion chromatography, 1H nuclear magnetic resonance (NMR) and 13C NMR. The degree of functionalization has been determined by 1H NMR.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
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