KIM, JH LEE, MK RYU, CY LEE, JW HWANG, SS PARK, TS KIM, KU YOON, HS AHN, BI CHAR, KH RYU, JH QUIRK, RP 2024-01-21T22:10:17Z 2024-01-21T22:10:17Z 2022-01-10 1994-01 0032-3896 https://pubs.kist.re.kr/handle/201004/145900 The chain-end sulfonation of alpha,omega-dilithiopolystyrene prepared by lithium naphthalenide as a difunctional initiator using 1,3-propanesultone was studied by the characterization methodologies such as acid/base titration, colorimetric method using methylene blue, two-phase titration with Hyamine 1622, size exclusion chromatographic analysis infrared, and H-1 NMR spectroscopic analysis. The reactivity modification of alpha,omega-dilithiopolystyrene through the end-capping with 1,1-diphenylethylene prior to the sulfoalkylation in benzene-tetrahydrofuran (THF) (10:1, v/v) at 25-degrees-C with excess 1,3-propanesultone is suggested as a useful method for the preparation of the corresponding dilithium alpha,omega-disulfonated polystyrene in relatively high yield based on the results from the acid/base titration (>85%). English SOC POLYMER SCIENCE JAPAN HALATO-TELECHELIC POLYMERS IONOMERS LITHIUM SYNTHESIS OF DILITHIUM ALPHA,OMEGA-DISULFONATED POLYSTYRENE BY ANIONIC-POLYMERIZATION Article 10.1295/polymj.26.1111 1 POLYMER JOURNAL, v.26, no.10, pp.1111 - 1117 POLYMER JOURNAL 26 10 1111 1117 scie scopus A1994PQ82600003 2-s2.0-0028706699 Polymer Science Polymer Science Article HALATO-TELECHELIC POLYMERS IONOMERS LITHIUM ALPHA,OMEGA-DILITHIOPOLYSTYRENE DIFUNCTIONAL INITIATOR ALPHA,OMEGA-BIS(1-LITHIO-1,1-DIPHENYLETHYL)POLYSTYRENE SULFOALKYLATION 1,3-PROPANESULTONE DILITHIUM ALPHA,OMEGA-DISULFONATED POLYSTYRENE SIZE EXCLUSION CHROMATOGRAPHY