Article
  • Phase Separation Behavior of the PU-PS IPN's During Simultaneous Polymerization
  • Lee SS, Kim SC
  • PU-PS IPN의 동시중합 과정에서의 상분리 현상
  • 이선석, 김성철
Abstract
Phase separation behavior of the polyurethane (PU)-polystyrene (PS) interpenetrating polymer networks (IPN''s) was investigated by measuring the turbidity during simultaneous polymerization. The change in transmitted light intensity through the reacting mixture was recorded with elapsed time, and was studied as a function of composition, synthesis temperature, crosslink density and catalyst concentration. The polymerization kinetics of the PU and PS were also obtained for the 50/50 composition mixture. The PU polymerization rate was much higher than PS, thus it seemed that the phase separation process was mainly controlled by the PU polymerization rate. The onset of the phase separation occurred at around similar molecular weight range of the PU, regardless of other experimental variables. It was also observed that the rate of phase separation was dependent on the rate of the increase in molecular weight as well as the diffusion rate controlled by the medium viscosity.

Keywords:

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1986; 10(3): 236-244

    Published online Jun 25, 1986

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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