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On-line monitoring of reaction temperatures during anionic polymerization of poly(styrene- b -methyl methacrylate) and poly(styrene- b -2-vinyl pyridine) with a 1,1-diphenylhexyl lithium initiator in THF

On-line monitoring of reaction temperatures during anionic polymerization of poly(styrene- b... Abstract Poly(styrene-b-methyl methacrylate) and poly(styrene-b-2-vinyl pyridine) block copolymers with narrow molecular weight distributions (1.05≤MWD≤1.17) were achieved via a pre-cooled monomer addition method using a diphenyl hexyl lithium initiator in tetrahydrofuran under sequential isothermal conditions. The styrene block was polymerized at −25 and −15 °C, and the second block copolymerization of PS-b-PMMA and PS-b-P2VP was carried out at −78 °C. A module-type reactor system was constructed under an inert atmosphere, which could monitor the temperature and torque during polymerization. Monomers for the second block were cooled and maintained at approximately −30 °C to control the exothermic reaction temperatures while being added to the reactor. The exothermic reaction temperature could be minimized (ΔT RMAX ≤+11 °C) by the addition of the pre-cooled monomer. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Macromolecular Research" Springer Journals

On-line monitoring of reaction temperatures during anionic polymerization of poly(styrene- b -methyl methacrylate) and poly(styrene- b -2-vinyl pyridine) with a 1,1-diphenylhexyl lithium initiator in THF

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References (37)

Publisher
Springer Journals
Copyright
2014 The Polymer Society of Korea and Springer Sciene+Business Media Dordrecht
ISSN
1598-5032
eISSN
2092-7673
DOI
10.1007/s13233-014-2039-4
Publisher site
See Article on Publisher Site

Abstract

Abstract Poly(styrene-b-methyl methacrylate) and poly(styrene-b-2-vinyl pyridine) block copolymers with narrow molecular weight distributions (1.05≤MWD≤1.17) were achieved via a pre-cooled monomer addition method using a diphenyl hexyl lithium initiator in tetrahydrofuran under sequential isothermal conditions. The styrene block was polymerized at −25 and −15 °C, and the second block copolymerization of PS-b-PMMA and PS-b-P2VP was carried out at −78 °C. A module-type reactor system was constructed under an inert atmosphere, which could monitor the temperature and torque during polymerization. Monomers for the second block were cooled and maintained at approximately −30 °C to control the exothermic reaction temperatures while being added to the reactor. The exothermic reaction temperature could be minimized (ΔT RMAX ≤+11 °C) by the addition of the pre-cooled monomer.

Journal

"Macromolecular Research" – Springer Journals

Published: Mar 1, 2014

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