Details

Autor(en) / Beteiligte

• Helou, Marion
• Brusson, Jean-Michel
• Carpentier, Jean-François
• Guillaume, Sophie M.

Titel

Functionalized polycarbonates from dihydroxyacetone: insights into the immortal ring-opening polymerization of 2,2-dimethoxytrimethylene carbonate

Ist Teil von

• Polymer chemistry, 2011-01, Vol.2 (12), p.2789-2795

Ort / Verlag

Royal Society of Chemistry - RSC

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Functionalized polycarbonates derived from 2,2-dimethoxytrimethylene carbonate (TMC(OMe)2) have been prepared with controlled molecular features by immortal ring-opening polymerization , under mild conditions (bulk, 60-90 °C), using various (metallo)organic/alcohol (diol ) binary catalyst systems: the β-diiminate zinc complex [(BDIiPr)Zn(N(SiMe3)2)] (BDI = CH(CMeNC6H3-2,6-iPr2)2), the aluminium triflate, or the organic bases 4-N,N-dimethylaminopyridine (DMAP), 1.5.7-triazabicyclo-[4.4.0]dec-5-ene (TBD) and 2-tert-butylimino-2-diethylamino-1,3-dimethylperhydro-1,3,2-diazaphosphorine (BEMP), as catalyst precursors, combined with benzyl alcohol or 1,3-propanediol acting both as a co-initiator and a chain transfer agent. For the first time, well-defined α-hydroxy-ω-alkoxyester and α,ω-dihydroxy telechelic acetal -functionalized homopolycarbonates were thus prepared with molar mass up to 70[thin space (1/6-em)]200 g mol−1. These polymers were characterized at the molecular (NMR , SEC ), thermal (DSC , TGA ) and mechanical levels, and compared to conventional PTMC. P(TMC(OMe)2) is a rigid and brittle polymer material (E = 3190 ± 70 MPa, εr = 9 ± 1%).