Table 2. Glass Transition Temperatures (Tg), Crystal Fraction (XC), Mobile Amorphous Weight Fraction (XMAF), Rigid Amorphous Weight Fraction (XRAF), Experimental Elastic Modulus (E), Tensile Strength at Break (TS), and Elongation at Break Measured at Troom for PLLA after Crystallization at Tmold = 95 and 110 °C for Different Molding Times.
condition | Tg (°C)a | XCb | XMAFb | XRAFc | E (GPa) | TS (MPa) | elongation at break (%) |
---|---|---|---|---|---|---|---|
amorphous | 57.0 | 0.00 | 1.00 | 0.00 | 3.60 ± 0.19 | 60.3 ± 2.2 | 3.60 ± 0.50 |
Tmold = 95 °C, tmold = 15 min | 59.0 | 0.29 | 0.48 | 0.23 | 3.86 ± 0.18 | 58.6 ± 1.2 | 1.68 ± 0.10 |
Tmold = 95 °C, tmold = 30 min | 63.5 | 0.38 | 0.39 | 0.23 | 3.83 ± 0.14 | 57.8 ± 1.1 | 1.68 ± 0.10 |
Tmold = 95 °C, tmold = 40 min | 64.5 | 0.39 | 0.38 | 0.23 | 3.82 ± 0.20 | 57.9 ± 2.7 | 1.67 ± 0.10 |
Tmold = 95 °C, tmold = 50 min | 65.0 | 0.40 | 0.36 | 0.24 | 3.92 ± 0.17 | 54.6 ± 1.7 | 1.60 ± 0.10 |
Tmold = 110 °C, tmold = 5 min | 58.0 | 0.18 | 0.75 | 0.07 | 3.95 ± 0.22 | 50.8 ± 3.0 | 1.37 ± 0.10 |
Tmold = 110 °C, tmold = 10 min | 60.0 | 0.38 | 0.47 | 0.15 | 4.08 ± 0.22 | 50.8 ± 3.2 | 1.36 ± 0.17 |
Tmold = 110 °C, tmold = 15 min | 61.0 | 0.40 | 0.42 | 0.18 | 4.19 ± 0.19 | 50.6 ± 2.5 | 1.31 ± 0.15 |
Tmold = 110 °C, tmold = 20 min | 62.0 | 0.42 | 0.38 | 0.20 | 4.42 ± 0.10 | 49.7 ± 3.0 | 1.24 ± 0.24 |
Estimated error from repeated measurements: ±0.5 K.
Estimated error from repeated measurements: ±0.02.
Estimated errors from repeated measurements: ±0.04.