Physical properties of aliphatic polycarbonates made from CO 2 and epoxides
2003; Wiley; Volume: 89; Issue: 5 Linguagem: Inglês
10.1002/app.12355
ISSN1097-4628
AutoresSudhir D. Thorat, P. J. Phillips, В. В. Семенов, Andre Gakh,
Tópico(s)Polymer Foaming and Composites
ResumoAbstract A homologous series of aliphatic polycarbonates with different side‐chain lengths was synthesized by ring‐opening polymerization of terminal epoxides with CO 2 using zinc adipionate as catalyst [patented process of Empower Materials (formerly PAC Polymers Inc.)]. Additionally, a polycarbonate was made having a cyclohexane unit in its backbone, together with a terpolymer having both cyclohexane and propylene units. After characterization of thermal properties the aliphatic polycarbonates were found to be completely amorphous. Polycarbonates derived from long‐chain epoxides showed a glass‐transition temperature ( T g ) below room temperature, whereas polycarbonates derived from cyclohexene oxide showed a T g of 105°C, the highest yet reported for this class of polymers. The initial decomposition temperature of the polymers in air and nitrogen atmospheres was found to be less than 300°C. The mechanical properties and the dynamic mechanical relaxation behavior of the polymers were also reported. The effect of the chemical structure on the physical properties of aliphatic polycarbonates was discussed. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1163–1176, 2003
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