User:Alicia Rasines Mazo/Notebook/CHEM-582 Experimental Chemistry II/2015/02/11

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Tasks for February 11

  • To synthesize new, thinner films containing TiO2 and epoxy and epoxy alone
  • To measure the swelling of a synthesized epoxy film

Measurement of swelling in epoxy film

  • The film made on February 4 was cut into pieces, weighed and measured for thickness, then placed in water until the next lab period
  • Measurements were as follows:
Section Initial thickness (mm) Initial weight (g) Final thickness (mm) Final weight (g) % difference in thickness % increase in weights
1 2.17 2.22551 2.30 2.24013 5.99 0.6569
2 1.78 2.23953 1.78 2.25681 0 0.7716
3 1.65 0.93694 1.66 0.94787 0.61 1.1656
4 2.32 2.30817 2.29 2.32841 -1.29 0.8769