Table 2. Thermal Properties of PGA-Based Copolymers: PGBAT, PGBS, PGBT, PGA, and PBAT Were Measured by DSC.
| first
heat |
first
cool |
second
heat |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| sample | Tm/°C | ΔHm/J g–1 | Tc/°C | ΔHc/J g–1 | Tg/°C | Tcc/°C | ΔHcc/J g–1 | Tm/°C | ΔHm/J g–1 |
| PBAT | 117.3 | 23.0 | 75.9 | 17.5 | –32.7 | 118.6 | 11.0 | ||
| PGBAT21 | 111.4 | 14.9 | 48.3 | 16.2 | –24.5 | 102.8 | 14.2 | ||
| PGBAT44 | 61.3 | 11.6 | –19.0 | ||||||
| PGBAT86 | 132.8 | 0.6 | 11.2 | ||||||
| PGBAT89 | 138.9 | 9.0 | 15.9 | ||||||
| PGBAT92 | 166.9 | 32.5 | 20.0 | 118.3 | 5.7 | 163.3 | 5.37 | ||
| PGA | 225.1 | 76.0 | 193.0 | 76.4 | 40.1 | 222.5 | 77 | ||
| PGBS91 | 147 | 7.8 | 15.7 | ||||||
| PGBT80 | 23.7 | ||||||||