Table 6.

Macroscopic effects of melt temperature on weight, specific weight, and expansion ratio.

Polypropylene
Melt Temperature (°C)	200	210	220
Weight (g)	31.71 ($\pm$0.027)	31.62 ($\pm$0.042)	31.33 ($\pm$0.053)
Specific Weight	0.907 ($\pm$0.001)	0.800 ($\pm$0.002)	0.736 ($\pm$0.003)
Expansion Ratio	1.000 ($\pm$0.001)	1.134 ($\pm$0.032)	1.232 ($\pm$0.006)
Polystyrene
Melt Temperature (°C)	200	210	220
Weight (g)	48.10 ($\pm$0.936)	47.65 ($\pm$1.404)	47.30 ($\pm$0.917)
Specific Weight	0.927 ($\pm$0.018)	0.865 ($\pm$0.019)	0.908 ($\pm$0.009)
Expansion Ratio	1.123 ($\pm$0.021)	1.202 ($\pm$0.027)	1.145 ($\pm$0.012)