Solution and solid-state properties of mechanically linked polycarbonates
UNSPECIFIED. (2004) Solution and solid-state properties of mechanically linked polycarbonates. MACROMOLECULES, 37 (1). pp. 66-70. ISSN 0024-9297Full text not available from this repository.
Official URL: http://dx.doi.org/10.1021/ma034680c
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|
|Official Date:||13 January 2004|
|Number of Pages:||5|
|Page Range:||pp. 66-70|
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