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. 2017 Oct 5;2(10):6446–6454. doi: 10.1021/acsomega.7b00983

Table 2. Interfacial Tension and Spreading Coefficient at 20 and 180 °C Extrapolation Using the Harmonic and Geometric Mean Equations.

   
 spreading coefficient
  interfacial tension at 20 °C (mN·m–1)
 20 °C
 180 °C
equation PP/PLA PP/PHBV PLA/PHBV PLA/PHBV PHBV/PLA PP/(PLA or PHBV) PLA/PHBV PHBV/PLA PP/(PLA or PHBV)
harmonic 9.94 3.87 3.73 –9.79 2.33 –10.08 –10.67 1.40 –9.64
geometric 5.64 2.05 1.89 –5.48 1.70 –5.79 –5.94 1.22 –5.56