UNSPECIFIED. (2004) Solution and solid-state properties of mechanically linked polycarbonates. MACROMOLECULES, 37 (1). pp. 66-70. ISSN 0024-9297

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Abstract

Solution and solid-state properties of novel mechanically linked polyearbonate copolymers are reported and compared to corresponding properties of a reference copolymer with identical chemical composition but no mechanical linkages. The unperturbed dimensions of the catenane copolymers in solution are smaller than for bisphenol A polycarbonate homopolymer, presumably reflecting favorable specific interactions between bisphenol A and catenane units. A difference is observed between the mechanically linked and unlinked analogues, pointing to a specific effect of the mechanical linkage. Crystallinity measurements suggest a segmented composition for the copolymers, consistent with the solid-state synthesis. The melting point of the catenane copolymers is lower than that of the bisphenol A polycarbonate homopolymer because of a copolymer effect. The melting point of a mechanically linked copolymer is higher than of the unlinked analogue, presumably because of the additional mobility in the melt introduced by free macrocycle chain ends vs interlocked catenane units.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	MACROMOLECULES
Publisher:	AMER CHEMICAL SOC
ISSN:	0024-9297
Date:	13 January 2004
Volume:	37
Number:	1
Number of Pages:	5
Page Range:	pp. 66-70
Identification Number:	10.1021/ma034680c
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/8892

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