UNSPECIFIED. (2003) Mechanically linked polycarbonate. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 125 (8). pp. 2200-2207. ISSN 0002-7863

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Abstract

The synthesis, by solid-state copolymerization, and characterization of the first polycatenanes based on a commercial polymer are reported. Various amounts of a benzylic amide [2]catenane, the corresponding macrocycle, and a rigid bisphenol fluorene derivative have been quantitatively and homogeneously incorporated into bisphenol A polycarbonate. The resulting copolymers were characterized by size exclusion chromatography coupled with viscosimetry, H-1 NMR, differential scanning calorimetry, and dynamic mechanical analysis. The unexpectedly small influence of [2]catenane incorporation on the glass transition temperature of the copolymers points to remarkable internal mobility of the catenane comonomer rings. A new relaxation linked to the flexible catenane units is also observed. The studies represent a detailed structural characterization of a polymer containing small amounts of mechanical linkages in its backbone and demonstrate that significant effects can be induced by doping conventional polymers with small percentages (2-6% of repeat units) of flexible catenanes.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Publisher:	AMER CHEMICAL SOC
ISSN:	0002-7863
Date:	26 February 2003
Volume:	125
Number:	8
Number of Pages:	8
Page Range:	pp. 2200-2207
Identification Number:	10.1021/ja0292546
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/10006

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