Synthesis of star-branched polymers by means of reactive melt blending of end-functionalized polymers

K. Sugiyama, R. Kakuchi, S. Kobayashi, Akira Hirao, J. Zhang, Thomas R Hoye, Chris Macosko

Research output: Contribution to conferencePaper

Abstract

Chain-end-functionalized poly(ε-caprolactone)s with one or two anhydride moieties (PCL-Anh and PCL-Anh2, respectively) were successfully synthesized by the successive reactions starting from a chain-end hydroxy group of the polymer. This involves an introduction of carboxylic acid by the reaction of hydroxy group with succinic anhydride, an introduction of conjugated diene function by Mitsunobu reaction with 2,4-hexadien-1-ol, and an introduction of anhydride moiety by Diels-Alder reaction with maleic anhydride. The melt blending of PCL-Anh with amino-functionalized polystyrene (PS-NH2) was carried out at 180°C. The SEC curves showed a new peak at the high molecular weight region corresponding to the objective AB diblock copolymer within 5 min, suggesting the smooth reaction of anhydride moiety and amino group. On the other hand, the melt blending of PCL-Anh2 with PS-NH2 proceeds smoothly to afford AB diblock copolymer, however, the quantitative reaction to produce A2B star-branched polymer seems to be difficult.

Original languageEnglish (US)
Pages2579-2580
Number of pages2
StatePublished - Dec 1 2006
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: Sep 20 2006Sep 22 2006

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CountryJapan
CityToyama
Period9/20/069/22/06

Fingerprint

Block copolymers
Stars
Maleic anhydride
Polymers
Carboxylic acids
Polystyrenes
Molecular weight

Keywords

  • Amino group
  • Anhydride moiety
  • End-functionalized polymer
  • Living anionic polymerization
  • Reactive melt blending
  • Star-branched polymer

Cite this

Sugiyama, K., Kakuchi, R., Kobayashi, S., Hirao, A., Zhang, J., Hoye, T. R., & Macosko, C. (2006). Synthesis of star-branched polymers by means of reactive melt blending of end-functionalized polymers. 2579-2580. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.

Synthesis of star-branched polymers by means of reactive melt blending of end-functionalized polymers. / Sugiyama, K.; Kakuchi, R.; Kobayashi, S.; Hirao, Akira; Zhang, J.; Hoye, Thomas R; Macosko, Chris.

2006. 2579-2580 Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.

Research output: Contribution to conferencePaper

Sugiyama, K, Kakuchi, R, Kobayashi, S, Hirao, A, Zhang, J, Hoye, TR & Macosko, C 2006, 'Synthesis of star-branched polymers by means of reactive melt blending of end-functionalized polymers' Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan, 9/20/06 - 9/22/06, pp. 2579-2580.
Sugiyama K, Kakuchi R, Kobayashi S, Hirao A, Zhang J, Hoye TR et al. Synthesis of star-branched polymers by means of reactive melt blending of end-functionalized polymers. 2006. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.
Sugiyama, K. ; Kakuchi, R. ; Kobayashi, S. ; Hirao, Akira ; Zhang, J. ; Hoye, Thomas R ; Macosko, Chris. / Synthesis of star-branched polymers by means of reactive melt blending of end-functionalized polymers. Paper presented at 55th Society of Polymer Science Japan Symposium on Macromolecules, Toyama, Japan.2 p.
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AU - Hoye, Thomas R

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N2 - Chain-end-functionalized poly(ε-caprolactone)s with one or two anhydride moieties (PCL-Anh and PCL-Anh2, respectively) were successfully synthesized by the successive reactions starting from a chain-end hydroxy group of the polymer. This involves an introduction of carboxylic acid by the reaction of hydroxy group with succinic anhydride, an introduction of conjugated diene function by Mitsunobu reaction with 2,4-hexadien-1-ol, and an introduction of anhydride moiety by Diels-Alder reaction with maleic anhydride. The melt blending of PCL-Anh with amino-functionalized polystyrene (PS-NH2) was carried out at 180°C. The SEC curves showed a new peak at the high molecular weight region corresponding to the objective AB diblock copolymer within 5 min, suggesting the smooth reaction of anhydride moiety and amino group. On the other hand, the melt blending of PCL-Anh2 with PS-NH2 proceeds smoothly to afford AB diblock copolymer, however, the quantitative reaction to produce A2B star-branched polymer seems to be difficult.

AB - Chain-end-functionalized poly(ε-caprolactone)s with one or two anhydride moieties (PCL-Anh and PCL-Anh2, respectively) were successfully synthesized by the successive reactions starting from a chain-end hydroxy group of the polymer. This involves an introduction of carboxylic acid by the reaction of hydroxy group with succinic anhydride, an introduction of conjugated diene function by Mitsunobu reaction with 2,4-hexadien-1-ol, and an introduction of anhydride moiety by Diels-Alder reaction with maleic anhydride. The melt blending of PCL-Anh with amino-functionalized polystyrene (PS-NH2) was carried out at 180°C. The SEC curves showed a new peak at the high molecular weight region corresponding to the objective AB diblock copolymer within 5 min, suggesting the smooth reaction of anhydride moiety and amino group. On the other hand, the melt blending of PCL-Anh2 with PS-NH2 proceeds smoothly to afford AB diblock copolymer, however, the quantitative reaction to produce A2B star-branched polymer seems to be difficult.

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