TY  - JOUR
A1  - Liang, Xiao
A1  - Behl, Marc
A1  - Lützow, Karola
A1  - Lendlein, Andreas
T1  - Cooligomers from morpholine-2,5-dione and para-dioxanone and catalyst complex SnOct(2)/2-hydroxyethyl sulfide
T2  - MRS advances : a journal of the Materials Research Society (MRS)
N2  - Complexes from catalysts and initiator can be used to insert a specific number of additional chemical functional groups in (co)polymers prepared by ring-opening polymerization (ROP) of lactones. We report on the synthesis of cooligomers from sec-butyl-morpholine-2,5-dione (SBMD) and para-dioxanone (PDX) by ROP with varied feed ratios in the bulk using the catalyst complex SnOct(2)/2-hydroxyethyl sulfide. M-n of the cooligomers (determined by GPC) decreased with decreasing SBMD feed ratio from 4200 +/- 420 to 800 +/- 80 g mol(-1). When the feed ratio was reduced from 80 to 50 mol% the molar ratio of SBMD of the cooligomers (determined by H-1-NMR) remained nearly unchanged between 81 and 86 mol% and was attributed to a higher reactivity of SBMD. This assumption was confirmed by fractionation of GPC, in which an increase of SBMD with increasing molecular weight was observed. The catalyst/initiator system provides a high potential to create orthogonal building blocks by cleavage of the sulfide bond.
Y1  - 2021
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/59491
SN  - 2059-8521
VL  - 6
IS  - 32
SP  - 764
EP  - 768
PB  - Springer
CY  - Heidelberg
ER  -