Abstract
On purpose to enhance the heat resistance of polycarbonate (PC), aromatic esters, which are the structural units of polyarylate (PAr), were incorporated. Six polyestercarbonates (PEC) over a full composition range were prepared through two-step low-temperature solution polycondensation reactions with controlled feeding of triphosgene. PEC prepared were characterized to be random copolymers with high molecular weights. The glass transition temperatures of PEC showed positive deviations from the rule of mixture. For PEC with low carbonate contents the glass transition temperatures were even higher than that of PAr, which was thought to be due to higher chain packing density of the copolymers. Thermal stability of PEC appeared to be enhanced from PC with increasing content of arylate units, while thermal degradation started at carbonate units.
| Original language | English |
|---|---|
| Pages (from-to) | 208-214 |
| Number of pages | 7 |
| Journal | Polymer (Korea) |
| Volume | 21 |
| Issue number | 2 |
| Publication status | Published - 1997 |
Keywords
- Polyestercarbonate
- Synthesis
- Thermal properties
- Thermal stability
ASJC Scopus subject areas
- General Chemical Engineering
- Polymers and Plastics
- Materials Chemistry