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Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder

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Published/Copyright: March 11, 2015
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International Polymer Processing
From the journal International Polymer Processing Volume 30 Issue 1

Abstract

In this study, a styrene/isoprene/styrene (SIS) triblock copolymer was synthesized in an intermeshing, co-rotating, twin-screw extruder. N-butyl lithium was used as the initiator. The styrene and isoprene monomer as well as 1,2-dibromoethane were sequentially added into the extruder. The weight content of isoprene in this copolymer was above 60%. Gel permeation chromatography (GPC) results showed that the polystyrene in the copolymer chains was mainly comprised of only one long block. Dynamic mechanical analysis (DMA) and transmission electron microscopy (TEM) showed that the polystyrene phase transferred from larger numbers of small microdomains to a continuous aggregation after the coupling reaction. As a result, the tensile stress and ultimate elongation was significantly improved, similar to the commercial product. Traditionally, SIS has only been synthesized by solution polymerization. The present work offers the capacity to synthesize it with very little or no solvent. This method fits the environmentally friendly trend.

* Mail address: Anna Zheng, Key Laboratory for Ultrafine Materials of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, PRC. E-mail:

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Received: 2013-10-21
Accepted: 2014-08-09
Published Online: 2015-03-11
Published in Print: 2015-03-02

© 2015, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Extrusion Defects and Flow Instabilities of Molten Polymers
  5. Investigating Thermal Stability and Flame Retardant Properties of Synthesized Halloysite Nanotubes (HNT)/Ethylene Propylene Diene Monomer (EPDM) Nanocomposites
  6. Absorption Coefficient Measurement in Laser Transmission Welding of Thermoplastics
  7. Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
  8. Improving Film Die Flow Uniformity Using Optimization Methods Coupled with Finite Element Computational Fluid Dynamics (CFD) Analysis
  9. UV-Curable Technique of Magnetic Roller Soft Mold and Microstructure Pattern Replication
  10. Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
  11. Effect of Alumina Particles Embedded in Natural Rubber Foams on Cell Morphology and Thermo-Mechanical Properties
  12. Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends
  13. Measurement and Numerical Simulation of Void and Warpage in Glass Fiber Reinforced Molded Chunky Parts
  14. Experimental Study for Extrusion of Polypropylene/Wood Flour Composites
  15. A Personal Perspective on the Use of Modelling Simulation for Polymer Melt Processing
  16. Slip Heating in Die Drool with Viscous Dissipation
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
https://doi.org/10.3139/217.2884

Articles in the same Issue

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Extrusion Defects and Flow Instabilities of Molten Polymers
  5. Investigating Thermal Stability and Flame Retardant Properties of Synthesized Halloysite Nanotubes (HNT)/Ethylene Propylene Diene Monomer (EPDM) Nanocomposites
  6. Absorption Coefficient Measurement in Laser Transmission Welding of Thermoplastics
  7. Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
  8. Improving Film Die Flow Uniformity Using Optimization Methods Coupled with Finite Element Computational Fluid Dynamics (CFD) Analysis
  9. UV-Curable Technique of Magnetic Roller Soft Mold and Microstructure Pattern Replication
  10. Rheological Indicators for Environmental Stress Cracking Resistance of Polyethylene
  11. Effect of Alumina Particles Embedded in Natural Rubber Foams on Cell Morphology and Thermo-Mechanical Properties
  12. Effects of SEBS-g-MA on Rheology, Morphology and Mechanical Properties of PET/HDPE Blends
  13. Measurement and Numerical Simulation of Void and Warpage in Glass Fiber Reinforced Molded Chunky Parts
  14. Experimental Study for Extrusion of Polypropylene/Wood Flour Composites
  15. A Personal Perspective on the Use of Modelling Simulation for Polymer Melt Processing
  16. Slip Heating in Die Drool with Viscous Dissipation
  17. PPS News
  18. PPS News
  19. Seikei Kakou Abstracts
  20. Seikei Kakou Abstracts
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