Mechanically linked polycarbonate
UNSPECIFIED. (2003) Mechanically linked polycarbonate. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 125 (8). pp. 2200-2207. ISSN 0002-7863Full text not available from this repository.
Official URL: http://dx.doi.org/10.1021/ja0292546
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 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 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|
|Date:||26 February 2003|
|Number of Pages:||8|
|Page Range:||pp. 2200-2207|
Actions (login required)