High-resolution 13C and 1H solution NMR study of poly(lactide)

Khalid A.M. Thakur; Robert T. Kean; Eric S. Hall; Jeffrey J. Kolstad; Tim A. Lindgren; Matthew A. Doscotch; J. Ilja Siepmann; Eric J. Munson

High-resolution ¹³C and ¹H solution NMR study of poly(lactide)

Khalid A.M. Thakur, Robert T. Kean, Eric S. Hall, Jeffrey J. Kolstad, Tim A. Lindgren, Matthew A. Doscotch, J. Ilja Siepmann, Eric J. Munson

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

253 Scopus citations

Abstract

High-resolution 500 MHz solution-state ¹H and ¹³C NMR spectra of various poly(lactides) indicate at least hexad stereosequence sensitivity. The poly(lactides) were prepared in vials by melt polymerization of various combinations of L-lactide, D-lactide, and meso-lactide at 180°C for 3 h using tin(II) bis(2-ethylhexanoate) (tin(II) octoate) as the catalyst in a 1:10 000 ratio. The intensity distribution of the various stereosequence resonances in the NMR spectra indicates a preference for syndiotactic addition during the polymerization process. Minimal evidence of transesterification was observed for these polymerization conditions.

Original language	English (US)
Pages (from-to)	2422-2428
Number of pages	7
Journal	Macromolecules
Volume	30
Issue number	8
State	Published - Apr 21 1997

OpenUrl availability

Full text

Cite this

@article{89a3469c4bf54802bc12c8ebcbfa72e8,

title = "High-resolution 13C and 1H solution NMR study of poly(lactide)",

abstract = "High-resolution 500 MHz solution-state 1H and 13C NMR spectra of various poly(lactides) indicate at least hexad stereosequence sensitivity. The poly(lactides) were prepared in vials by melt polymerization of various combinations of L-lactide, D-lactide, and meso-lactide at 180°C for 3 h using tin(II) bis(2-ethylhexanoate) (tin(II) octoate) as the catalyst in a 1:10 000 ratio. The intensity distribution of the various stereosequence resonances in the NMR spectra indicates a preference for syndiotactic addition during the polymerization process. Minimal evidence of transesterification was observed for these polymerization conditions.",

author = "Thakur, {Khalid A.M.} and Kean, {Robert T.} and Hall, {Eric S.} and Kolstad, {Jeffrey J.} and Lindgren, {Tim A.} and Doscotch, {Matthew A.} and Siepmann, {J. Ilja} and Munson, {Eric J.}",

year = "1997",

month = apr,

day = "21",

language = "English (US)",

volume = "30",

pages = "2422--2428",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "8",

}

TY - JOUR

T1 - High-resolution 13C and 1H solution NMR study of poly(lactide)

AU - Thakur, Khalid A.M.

AU - Kean, Robert T.

AU - Hall, Eric S.

AU - Kolstad, Jeffrey J.

AU - Lindgren, Tim A.

AU - Doscotch, Matthew A.

AU - Siepmann, J. Ilja

AU - Munson, Eric J.

PY - 1997/4/21

Y1 - 1997/4/21

N2 - High-resolution 500 MHz solution-state 1H and 13C NMR spectra of various poly(lactides) indicate at least hexad stereosequence sensitivity. The poly(lactides) were prepared in vials by melt polymerization of various combinations of L-lactide, D-lactide, and meso-lactide at 180°C for 3 h using tin(II) bis(2-ethylhexanoate) (tin(II) octoate) as the catalyst in a 1:10 000 ratio. The intensity distribution of the various stereosequence resonances in the NMR spectra indicates a preference for syndiotactic addition during the polymerization process. Minimal evidence of transesterification was observed for these polymerization conditions.

AB - High-resolution 500 MHz solution-state 1H and 13C NMR spectra of various poly(lactides) indicate at least hexad stereosequence sensitivity. The poly(lactides) were prepared in vials by melt polymerization of various combinations of L-lactide, D-lactide, and meso-lactide at 180°C for 3 h using tin(II) bis(2-ethylhexanoate) (tin(II) octoate) as the catalyst in a 1:10 000 ratio. The intensity distribution of the various stereosequence resonances in the NMR spectra indicates a preference for syndiotactic addition during the polymerization process. Minimal evidence of transesterification was observed for these polymerization conditions.

UR - http://www.scopus.com/inward/record.url?scp=0031119764&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031119764&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031119764

SN - 0024-9297

VL - 30

SP - 2422

EP - 2428

JO - Macromolecules

JF - Macromolecules

IS - 8

ER -

High-resolution ¹³C and ¹H solution NMR study of poly(lactide)

Abstract

OpenUrl availability

Other files and links

Fingerprint

Cite this