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Development of Highly Precise Controlling Methods for Polymer Microspher by Taking Advantage of Nonlinear Dynamics

Research Project

Project/Area Number 13555207
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 化学工学一般
Research InstitutionKobe University

Principal Investigator

OHMURA Naoto  Kobe University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (50223954)

Co-Investigator(Kenkyū-buntansha) KATAOKA Kunio  Kobe University, Faculty of Engineering, Professor, 工学部, 教授 (20031081)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 2003: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2001: ¥5,400,000 (Direct Cost: ¥5,400,000)
KeywordsContinuous emulsion polymerization / Nonlinear dynamics / Dynamic process / Bifurcation Phenomena / Self-sustained oscillation / Periodic operation / Unsteadiness / Particle aggregation / 多重安定性 / テイラー渦流反応装置 / 粒子径分布振動 / 重合率振動 / 粒子径分布
Research Abstract

This research attempted to take advantage of the nonlinear dynamics in continuous emulsion polymerization processes in order to control latex particle size distribution. When the emulsion polymerization of vinyl acetate was conducted in a CSTR under conditions below the critical micelle concentration of the emulsifier, the monomer conversion attained in a time-independent steady-state operation showed a drastic rise from 0 to over 60% at a critical reaction temperature or mean residence time. The mean residence time or the reaction temperature was switched alternately between two values in the non-steady-state operation, one giving zero monomer conversion and the other a high monomer conversion in the usual steady-state operation. The periodic-switching operation induced oscillations in monomer conversion in time. The particle size distribution varied synchronously with the switching operation. This research showed the possibility of controlling the particle size distribution by adjust … More ing the frequency and/or the amplitude of the temporal variation of the mean residence time or reaction temperature. This research found that even while the constant monomer conversion was maintained at the steady state, the particle size distribution oscillated with a very large time period. This research revealed that the oscillations occur by a competitive interaction between polymerization reaction and aggregation of latex particles. In order to vary the colloidal stability of latex particles, a nonionic surfactant was added in some cases. It was found that using a mixture of a nonionic surfactant and an anionic surfactant was very effective for suppressing the oscillations. In order to take advantage of the oscillations of particle size, emulsion polymerization of vinyl acetate was performed in a system of two continuous stirred tank reactors in series. The oscillatory behavior could be controlled by varying the rotational speed of the impeller and the mean residence time. The research using two CSTR in series indicated the possibility of producing various poly-dispersed latex particles. Less

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (33 results)

All Other

All Publications (33 results)

  • [Publications] N.Ohmura: "Novel Operating Method for Controlling Latex Particles Size Distribution in Emulsion Polymerization of Vinyl Acetate"Industrial & Engineering Chemistry Research. 40-23. 5177-5183 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Self-Sustained Oscillation of PSD of Latex Particles in Continuous Emulsion Polymerization"Proc.9th APCChE Congress and CHEMECA 2002. (CD-ROM). 1-8 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Kataoka: "Self-Sustained Oscillation of Particle Size Distribution in Continuous Emulsion Polymerization"Proc.15^<th> International Congress of Chemical and Process Engineering. (CD-ROM). 1-5 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Kataoka: "Effect of Nonlinear Coupling between Transport and Reaction Dynamics in Polymerization Processes"Proc.13th International Symposium on Transport Phenomena. 491-496 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 片岡邦夫: "回分および連続操作による酢酸ビニルの乳化重合のダイナミックス"化学工学論文集. 29-3. 363-367 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 大村直人: "反応温度の周期操作を用いた酢酸ビニルの連続乳化重合"化学工学論文集. 29-3. 378-381 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Effect of Aggregation of Polymer Particles on Particle Size Distribution in Cnotinuous Emulsion Polymerization of Vinyl Acetate"Proc.6th Italian Conference on Chemical and Process Engineering. 3. 1319-1324 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Effect of the Emulsifier on the Dynamic Behavior of Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate"Journal of Chemical Engineering of Japan. 37-3. 461-464 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] N.Ohmura: "Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series"Proc.10th APCChE Congress. (CD-ROM). 1-8 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Novel Operating Method for Controlling Latex Particles Size Distribution in Emulsion Polymerization of Vinyl Acetate"Industrial & Engineering Chemistry Research. 40-23. 177-5183 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Self-Sustained Oscillation of PSD of Latex Particles in Continuous Emulsion Polymerization"Proc.9th APCChE Congress and CHEMECA 2002. (CD-ROM). 1-8 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kunio Kataoka: "Self-Sustained Oscillation of Particle Size Distribution in Continuous Emulsion Polymerization"Proc.15^<th> International Congress of Chemical and Process Engineering. (CD-ROM). 1-5 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kunio Kataoka: "Effect of Nonlinear Coupling between Transport and Reaction Dynamics in Polymerization Processes"Proc.13th International Symposium on Transport Phenomena. 491-496 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Kunio Kataoka: "Dynamics of emulsion Polymerization of Vinyl Acetate by Batch and Continuous Flow Operations"Kagaku Kougaku Ronbunshu. 29-3. 363-367 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Continuous Emulsion Polymerization of Vinyl Acetate with Periodic Alternation of Reaction Temperature"Kagaku Kougaku Ronbunshu. 29-3. 378-381 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Effect of Aggregation of Polymer Particles on Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate"Proc.6th Italian Conference on Chemical and Process Engineering. 3. 1319-1324 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Effect of the Emulsifier on the Dynamic Behavior of Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate"Journal of Chemical Engineering of Japan. 37-3. 461-464 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Naoto Ohmura: "Emulsion Polymerization of Vinyl Acetate in a System of Two CSTR in Series"Proc.10th APCChE Congress. (CD-ROM). 1-8 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 片岡邦夫: "回分および連続操作による酢酸ビニルの乳化重合のダイナミックス"化学工学論文集. 第29巻・第3号. 363-367 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 大村直人: "反応温度の周期操作を用いた酢酸ビニルの連続乳化重合"化学工学論文集. 第29巻・第3号. 378-381 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Naoto Ohmura: "Effect of Aggregation of Polymer Particles on Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate"Proceedings of the 6th Italian Conference on Chemical and Process Engineering, Pisa, Italia. Vol.3. 1319-1324 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Naoto Ohmura: "Effect of the Emulsifier on the Dynamic Behavior of Particle Size Distribution in Continuous Emulsion Polymerization of Vinyl Acetate"Journal of Chemical Engineering of Japan. Vol.37・No.3(掲載決定). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Kataoka: "Effect of Nonlinear Coupling between Transport and Reaction Dynamics in Polymerization Processes"Proceedings of 13^<th> International Symposium on Transport Phenomena, Canada. 491-496 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Kataoka: "Self-sustained Oscillation of Particle Size Distribution in Continuous Emulsion Polymerization"Proceedings of 15^<th> International Congress of Chemical and Process Engineering, Praha, Czech. A5-2-38(CD-ROM). (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Ohmura: "Self-Sustained Oscillation of PSD of Latex Particles in Continuous Emulsion Polymerization"Proceedings of 9^<th> APCChE, Christchurch, New Zealand. 654(CD-ROM). 1-8 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Ohmura: "Effect of Inhomogeneous Mixing on Chemical Reaction in a Taylor Vortex Flow Reactor"Journal of Chemical Engineering of Japan. Vol.35・No.7. 692-695 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 大村直人: "反応温度の周期操作を用いた酢酸ビニルの連続乳化重合"化学工学論文集. (掲載決定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 片岡邦夫: "回分および連続操作による酢酸ビニルの乳化重合のダイナミックス"化学工学論文集. (掲載決定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Ohmura: "Novel Operating Method for Controlling Latex Particle Size Distribution in Emulsion Polymerization of Vinyl Acetate"Industrial & Engineering Chemistry Research. Vol.40・No.23. 5177-5183 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Makino: "Observation of Isolated Mixing Regions in a Stirred Vessel"Journal of Chemical Engineering of Japan. Vol.34・No.5. 574-578 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 牧野 司: "テイラー渦流反応装置における孤立混合領域"化学工学論文集. Vol.27・No.5. 566-573 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Makino: "Observation of Laminar Mixing Structure in a Perturbed Taylor Vortex Flow"Proceedings of 12^<th> International Couette-Taylor Workshop, Evanston, IL, USA. (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Makino: "Bifurcation of Organized Flow Structure in a Stirred Vessel at Low Reynolds Numbers"Proceedings of 6^<th> World Congress of Chemical Engineering, Melbourne, Australia (CD-ROM). (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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