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High pressure DSC of phenolformaldehyde moulding compounds

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Abstract

The influence of pressure on the polycondensation reaction between novolac resin (N) present in commercially available moulding compounds and hexamethylenetetramine (HMTA) was studied up to 80 bars under air and in an inert atmosphere. For a low HMTA content (N/HMTA=98/2 mass ratio) high pressure enables the detection of two successive curing reactions. With increasing HMTA content the peak due to the first curing reaction becomes less pronounced at high pressure, while the enthalpy of the second increases. In an inert atmosphere both curing reactions are well observable even at ambient pressure and for lower HMTA content take place at lower temperatures, as expected. For the sample with N/HMTA=98/2 the curing reaction was followed using TG-MS.

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Authors and Affiliations

  1. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, SI-1000, Ljubljana, Slovenia

    Romana Cerc Korošec & P. Bukovec

  2. Kolektor Pro d.o.o., Vojkova 10, 5280, Idrija, Slovenia

    Lea Županc Mežnar

Authors
  1. Romana Cerc Korošec
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  2. Lea Županc Mežnar
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  3. P. Bukovec
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Correspondence to Romana Cerc Korošec.

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Korošec, R.C., Mežnar, L.Ž. & Bukovec, P. High pressure DSC of phenolformaldehyde moulding compounds. J Therm Anal Calorim 95, 235–240 (2009). https://doi.org/10.1007/s10973-007-8916-8

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  • DOI: https://doi.org/10.1007/s10973-007-8916-8

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