Functional aliphatic copolyesters of succinic acid (SA) and citric acid (CA) were synthesized via direct copolycondensation in the presence of 1,4-butanediol, with titanium(IV) butoxide as a catalyst. The effects of the comonomer and comonomer ratio on the polycondensation and the melting and glass-transition temperatures were investigated. The melting temperature was very sensitive to the molar ratio of the SA-CA comonomer units. The chain extension of this poly(butylene succinate citrate) was carried out with hexamethylene diisocyanate. The intrinsic viscosity, crystallinity percentage, and rheological properties of these copolyesters were also studied.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of Polymer Science, Part A: Polymer Chemistry|
|State||Published - Oct 1 2002|
- Aliphatic copolyesters
- Chain extension
- Multifunctional monomer