gelling curves of pvc plastisols (50 phr plasticizer) with various Bahrain

  • gelling curves of pvc plastisols (50 phr plasticizer) with various Bahrain
  • gelling curves of pvc plastisols (50 phr plasticizer) with various Bahrain
  • gelling curves of pvc plastisols (50 phr plasticizer) with various Bahrain
  • Does temperature affect the gel time of PVC plastisols?
  • The variation of the gel time (tgel) with temperature for any composition of PVC plastisols was predicted from the Dickinson’s model (E. Dickinson, J Chem Soc Faraday Trans, 93:111 –114, 1997).
  • What is the process of gelation of a PVC plastisol?
  • The process of gelation of a PVC plastisol can be described as a process in which a liquid suspension of PVC resin with plasticizer becomes a solid material with elastomeric properties by being heated at an adequate temperature (Lopez et al. 2003). This process takes place in different stages.
  • When do PVC solutions in plasticizer reach the gel point?
  • From the analogy between the physical and chemical gelation, they concluded that PVC solutions in plasticizer reach the gel point when a power law relaxation is depicted. This makes possible to measure the gel point directly using a simple rheological test.
  • Does temperature affect morphology of gelled plastisols?
  • For the plastisol B, Fig. 7 a reveals that the grains of PVC touch after the isothermal time measurements at 350.1 K, whereas Fig. 7 b shows the interpenetration of PVC grains after the isothermal time measurements at 353.7 K. Contrary to that, any influence of the temperature on the morphology of gelled plastisols A is observed (Fig. 8).
  • Are flexidone plastisols more efficient than standard plasticizers?
  • Gelling curves of PVC plastisols (50 phr plasticizer) with various mixtures of Vestinol 9 and Flexidone100, 300, DBP and BBP. 5. Conclusion It could be shown, that Flexidone’s are very efficient PVC plasticizers. They are up to 50% more efficient than standard plasticizer.
  • Does PVC plastisol undergo a sol-gel transition?
  • However, a PVC plastisol undergoes sol–gel transition due to the percolation of the grains of PVC; it is the physical gelation. Consequently, it is necessary to keep in mind the difference between the gelation process and the sol–gel transition (physical gelation).

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