Stereoselective controlled polymerization of DL-lactide with [Ti(trisphenolate)O-i-Pr]2 initiators

被引：74

作者：

Russell, SK

Gamble, CL

Gibbins, KJ

Juhl, KCS

Mitchell, WS

Tumas, AJ

Hofmeister, GE ^{[1
]}

机构：

[1] Carleton Coll, Dept Chem, Northfield, MN 55057 USA

[2] Gustavus Adolphus Coll, Dept Chem, St Peter, MN 56083 USA

来源：

MACROMOLECULES | 2005年 / 38卷 / 24期

关键词：

D O I：

10.1021/ma051811w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The potential of stereoselective controlled polymerization of DL-Lactide with [Ti(trisphenolate)O-i-Pr] 2 initiators was analyzed. The anhydrous solvent used in polymerization were passed through a plug of alumina immediately prior to use. The extent of conversion the residue and integrating the methine resonances of the polymer relative to the methine resonances of the polymer. Results show a first-order dependence on compound, consistent with a coordination-insertion mechanism, and titanium isopropoxide ligand is transferred to the end of growing polymer chain during initiation.

引用

收藏

页码：10336 / 10340

页数：5

相关论文

共 57 条

[1] Metalloporphyrins as initiators for living and immortal polymerizations [J].

Aida, T ;

Inoue, S .

ACCOUNTS OF CHEMICAL RESEARCH, 1996, 29 (01) :39-48

[2] Linear trimer analogues of calixarene as chiral coordinating ligands: X-ray crystallographic and NMR spectroscopic characterization of chiral and achiral trisphenolates complexed to titanium(IV) and aluminum(III) [J].

Appiah, WO ;

DeGreeff, AD ;

Razidlo, GL ;

Spessard, SJ ;

Pink, M ;

Young, VG ;

Hofmeister, GE .

INORGANIC CHEMISTRY, 2002, 41 (14) :3656-3667

[3] Polymerization of lactide by monomeric Sn(II) alkoxide complexes [J].

Aubrecht, KB ;

Hillmyer, MA ;

Tolman, WB .

MACROMOLECULES, 2002, 35 (03) :644-650

[4] Intermolecular chain transfer to polymer with chain scission: General treatment and determination of k(p)/k(tr) in L,L-lactide polymerization [J].

Baran, J ;

Duda, A ;

Kowalski, A ;

Szymanski, R ;

Penczek, S .

MACROMOLECULAR RAPID COMMUNICATIONS, 1997, 18 (04) :325-333

[5] Polymerization of lactide with zinc and magnesium β-diiminate complexes:: Stereocontrol and mechanism [J].

Chamberlain, BM ;

Cheng, M ;

Moore, DR ;

Ovitt, TM ;

Lobkovsky, EB ;

Coates, GW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (14) :3229-3238

[6] A highly efficient initiator for the ring-opening polymerization of lactides and ε-caprolactone:: A kinetic study [J].

Chen, HY ;

Huang, BH ;

Lin, CC .

MACROMOLECULES, 2005, 38 (13) :5400-5405

[7] Single-site catalysts for ring-opening polymerization:: Synthesis of heterotactic poly(lactic acid) from rac-lactide [J].

Cheng, M ;

Attygalle, AB ;

Lobkovsky, EB ;

Coates, GW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (49) :11583-11584

[8]

Cheng M., 1999, POLYM PREPR AM CHEM, V40, P542

[9] Well-defined calcium initiators for lactide polymerization [J].

Chisholm, MH ;

Gallucci, JC ;

Phomphrai, K .

INORGANIC CHEMISTRY, 2004, 43 (21) :6717-6725

[10] Coordination chemistry and reactivity of monomeric alkoxides and amides of magnesium and zinc supported by the diiminato ligand CH(CMeNC6H3-2,6-iPr2)2.: A comparative study [J].

Chisholm, MH ;

Gallucci, J ;

Phomphrai, K .

INORGANIC CHEMISTRY, 2002, 41 (10) :2785-2794

← 1 2 3 4 5 6 →