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090			_aB-12754
245	1	0	_aHigh-Resolution 13C and 1H Solution NMR Study of Poly(lactide)
490	0		_vMacromolecules, 30, p.2422-2428, 1997
520	3		_aHigh-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.
700	1	2	_aThakur, K.Am.
700	1	2	_aKean, R.T.
700	1	2	_aHall, E.S.
700	1	2	_aKolstad, J.J.
700	1	2	_aLindgren, T.A.
700	1	2	_aDoscotch, M.A.
700	1	2	_aSiepmann, J.I.
700	1	2	_aSiepmann, J.I.
856	4	0	_uhttps://drive.google.com/file/d/1mU5AYvEaUbhCTzHbCjxxxFJ0nHJwdFqe/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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