Startseite Styrene/Isoprene/Styrene Thermoplastic Elastomer Prepared by Anionic Bulk Polymerization in a Twin-Screw Extruder
Artikel
Lizenziert
Nicht lizenziert Erfordert eine Authentifizierung

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

  • J.-M. Wang , X.-Y. Yuan , D. Shan und A. Zheng
Veröffentlicht/Copyright: 11. März 2015
Veröffentlichen auch Sie bei De Gruyter Brill

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:

References

Aggarwal, S. L.Structure and Properties of Block Polymers and Multiphase Polymer Systems: An Overview of Present Status and Future Potential”, Polymer, 17, 938956 (1976) 10.1016/0032-3861(76)90170-1Suche in Google Scholar

Angelo, R. J., Ikeda, R. M. and Wallach, M. L., “Multiple Glass Transitions of Block Polymers”, Polymer, 6, 141 (1965) 10.1016/0032-3861(65)90003-0Suche in Google Scholar

Bradford, E. B., Vanzo, E., “Ordered Structures of Styrene-butadiene Block Copolymers in the Solid State”, J. Polym. Sci. Part A-1, 6, 16611670 (1968) 10.1002/pol.1968.150060624Suche in Google Scholar

Cunningham, R. E., Auerbach, M., “Preparation and Stress-Strain Properties of SBS and SIS Block Polymers Made with Dilithium Initiators”, J. Appl. Polym. Sci., 16, 163173 (1972) 10.1002/app.1972.070160110Suche in Google Scholar

Gao, S., Zhang, Y., Zheng, A. and Xiao, H., “Polystyrene Prepared by Reactive Extrusion: Kinetics and Effect of Processing Parameters”, Polym. Adv. Tech., 15, 185191 (2004a) 10.1002/pat.436Suche in Google Scholar

Gao, S., Zhang, Y., Zheng, A. and Xiao, H., “Study on Nanometer-Size Styrene-Butadiene Multiblock Copolymers Synthesized by Reactive Extrusion”, J. Appl. Polym. Sci., 91, 22652270 (2004b) 10.1002/app.13357Suche in Google Scholar

Kraus, G., Childer, C. W. and Gruver, J. T., “Properties of Random and Block Copolymers of Butadiene and Styrene: Dynamic Properties and Glassy Transition Temperatures”, J. Appl. Polym. Sci., 11, 15811591 (1967)10.1002/app.1967.070110819Suche in Google Scholar

Lovisi, H. R., Nicolini, L. F. and Ferreira, A. A., “Chapter 7 The Influence of Uncoupled Styrene-Butadiene Diblock Copolymer on the Physical Properties of SBS Thermoplastic Elastomers” in Applications of Anionic Polymerization Research, Oxford University Press, Oxford, p. 9097 (1998) 10.1021/bk-1998-0696.ch007Suche in Google Scholar

Michaeli, W., Grefenstein, A. and Frings, W., “Synthesis of Polystyrene and Styrene Copolymers by Reactive Extrusion”, Adv. Polym. Tech., 12, 2533 (1993a) 10.1002/adv.1993.060120103Suche in Google Scholar

Michaeli, W., Hock, H. and Berghaus, U., “Reactive Extrusion of Styrene Polymers”, J. Appl. Polym. Sci., 48, 871886 (1993b) 10.1002/app.1993.070480512Suche in Google Scholar

Mochel, V. D., Claxton, W. E., “Reduction of Composite NMR Spectra by Using an Analog Computer”, J. Polym. Sci. Part A: Polym. Chem., 9, 345362 (1971) 10.1002/pol.1971.150090210Suche in Google Scholar

Morton, M., McGrath, J. E. and Juliano, P. C., “Structure-Property Relationships for Styrene-Diene Thermoplastic Elastomers”, J. Polym. Sci. Part C: Polymer Symposia, 26, 99115 (1969)Suche in Google Scholar

Pinheiro, A., Mano, J., “Study on the Glass Transition on Viscous-forming and Powder Materials Using Dynamic Mechanical Analysis”, Polym. Test., 28, 89 (2009) 10.1016/j.polymertesting.2008.11.008Suche in Google Scholar

Russell, T., U.S. Patent 3 686 107 (1972)10.1002/ange.19720841413Suche in Google Scholar

Sato, H., Tanaka, Y., “1H-NMR Study of Polyisoprenes”, J. Polym. Sci: Polym. Chem. Edit., 17, 35513558 (1979) 10.1002/pol.1979.170171113Suche in Google Scholar

Si, L., Zheng, A., Yang, H., Guo, R., Zhu, Z. and Zhang, Y., “A Study on New Polymerization of Styrene”, J. Appl. Polym. Sci., 85, 21302135 (2002) 10.1002/app.10779Suche in Google Scholar

Worsfold, D. J., “Anionic Copolymerization of Styrene and Isoprene in Cyclohexane”, J. Polym. Sci. Part A-1, 5, 2786 (1969)10.1002/pol.1967.150051106Suche in Google Scholar

Yu, Y., Jerome, R., Fayt, R. and Teyssie, P., “Efficiency of the sec-Butyllithium/m-Dissopropenylbenzene Diadduct as an Anionic Polymerization Initiator in Apolar Solvents”, Macromolecules, 27, 59585963 (1994) 10.1021/ma00099a005Suche in Google Scholar

Yuan, X., Guan Y., Li, S. and Zheng, A., “Anionic Bulk Polymerization to Synthesize Styrene-Isoprene Diblock and Multiblock Copolymers by Reactive Extrusion”, J. Appl. Polym. Sci., 131, 19 (2014) 10.1002/app.39429Suche in Google Scholar

Zhou, Y., Zhang, K., Sun, G., Wei, D. and Zheng, A., “Study on the Structure and Forming Mechanism of Styrene/Butadiene Multiblock Copolymers Polymerized by Reactive Extrusion”, Acta Polym. Sin., 3, 438442 (2006)Suche in Google Scholar

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

© 2015, Carl Hanser Verlag, Munich

Heruntergeladen am 29.10.2025 von https://www.degruyterbrill.com/document/doi/10.3139/217.2884/pdf
Button zum nach oben scrollen