Figure 12
The four radar plots compare values from 20 to 40 across extrusion temperatures of 180, 200, 220, 240, 260 and 280 degrees Celsius. Each panel compares 20 and 200 millimetres per second. Panel A is P L A slash O W 05. The 2 speed profiles remain similar, with values generally between about 25 and 34. Higher values occur near 180 and 200 degrees Celsius, while lower values occur near 240 and 260 degrees Celsius. Panel B is P L A slash O W 10. The 200 millimetres per second profile remains above the 20 millimetres per second profile at all temperatures. Values range from about 23 to 32, with higher values near 180 and 280 degrees Celsius and lower values near 240 degrees Celsius. Panel C is P L A slash O W 15. The 200 millimetres per second profile is higher than the 20 millimetres per second profile throughout. Values range from about 20 to 32. The 20 millimetres per second profile reaches its lowest value near 280 degrees Celsius, while the 200 millimetres per second profile reaches its highest value near 280 degrees Celsius. Panel D is P L A slash O W 20. The 200 millimetres per second profile remains above the 20 millimetres per second profile across the temperature range. Values are highest near 180 to 200 degrees Celsius for both speeds. The 20 millimetres per second profile decreases markedly near 280 degrees Celsius, while the 200 millimetres per second profile remains near 33.Variation of L* of PLA/OW composites as a function of T and V
Source: Authors’ own work