2013
DOI: 10.1002/macp.201300397
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Synthesis of Telechelic Poly(ether sulfone) Oligomers by Chain‐Growth Condensation Polymerization

Abstract: The synthesis of telechelic poly(ether sulfone)s with methoxy end groups is reported. Molecular weights ranging from 1600 to 2800 g mol−1 and polydispersities of 1.1–1.2 are synthesized by chain‐growth condensation polymerization. The initiator is chosen by using semiempirical calculations and 19F NMR spectroscopy measurements. The polymers are characterized by NMR spectroscopy and matrix‐assisted laser desorption/ionization time of flight (MALDI‐TOF) mass spectrometry (MS), and are terminated by a methoxy gro… Show more

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“…As reported in Table 1 and shown in Figure , the number‐average molecular weights determined by NMR spectroscopy present a linear relationship with the [M]/[I] ratio, although the slope is slightly different for NMR‐determined M n as compared to that for values calculated from the [M]/[I] ratio, which is mainly caused by the occurrence of polymolecularity. Results show a better reaction control than observed previously for PES synthesized with a methoxy‐terminated initiator, linearity being observed only up to an M n of 2000 g mol −1 in the case of PES …”
Section: Resultscontrasting
confidence: 48%
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“…As reported in Table 1 and shown in Figure , the number‐average molecular weights determined by NMR spectroscopy present a linear relationship with the [M]/[I] ratio, although the slope is slightly different for NMR‐determined M n as compared to that for values calculated from the [M]/[I] ratio, which is mainly caused by the occurrence of polymolecularity. Results show a better reaction control than observed previously for PES synthesized with a methoxy‐terminated initiator, linearity being observed only up to an M n of 2000 g mol −1 in the case of PES …”
Section: Resultscontrasting
confidence: 48%
“…In the present work, two methods previously used in the literature helped in initiator selection: Semi‐empirical calculations and 19 F NMR study of the aromatic fluorine reactivity . Both methods led to the same conclusion, and a methoxy‐terminated initiator was selected . In the present work, only 19 F NMR was used, as the chemical shift displacement of the aromatic fluorine in 19 F NMR spectroscopy is correlated to reactivity in polycondensation reactions .…”
Section: Resultsmentioning
confidence: 86%
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