THERMAL ANALYSIS (2)

• TgH (?)

  • the linear dependence on the IPDI content, less evident and reproducible than in the HDI series, leads to the hypothesis of another mixed phase

• TgF (?)

  • is linearly dependent on the weight fraction of IPDI: a possible explanation could be the formation of a mixed phase, or a larger sensitivity to the network constraints

• TgH (?)

  • is linearly dependent on the weight fraction of HDI
  • increases as the MW of the PFPE decreases, due to the higher cross-link density
  • MC products, with higher crosslinking density, have than higher TgH than the BC ones

• TgF (?)

  • when detectable, is rather constant (–60°C): this suggests the separation of a pure fluorinated phase in any case

Coatings from HDI

Coatings from IPDI

Difficult determination of Tg values by DSC, especially for MC coatings

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