A Series of Rare Earth Phenolates Substituted by Alkyl Groups for D,L-Lactide Ring-Opening Polymerization

武汉理工大学学报-材料科学版(英文版), 2011, 26(5): 939-944. doi: 10.1007/sl1595-011-0341-y

^1, , ^2, , ^3, , ^4, , ^5,

1.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

2.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

3.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

4.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

5.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

A Series of Rare Earth Phenolates Substituted by Alkyl Groups for D,L-Lactide Ring-Opening Polymerization

WANG Yan ^1, , NIU Yanhui ^2, , ZHANG Lifang ^3, , WANG Pei ^4, , SHEN Lijuan ^5,

1.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

2.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

3.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

4.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

5.Institute of Material Chemistry, Shanxi Normal University, Linfen 041004, China

Keywords： ring-opening polymerization

Single component rare earth phenolates substituted by various alkyl groups have been prepared and the correlation between tbe aryloxides' structure and catalytic activity in the ring-opening polymerization of D,L-lactide has also been investigated.The catalytic activity of all rare earth aryloxides,characteristics of the ring-opening polymerization as well as polymerization kinetics and mechanism were investigated.The results showed that both phenolates' catalytic activities and polymerization characteristics changed regularly,keeping in good concordance with variations in substitutents' number on phenol and structure of aryloxide ligands.The stronger ability of electron-donation of alkyl groups,the higher catalytic activity.Moreover,the more numbers of substituted alkyl on phenyl ring,the higher catalytic activity.The analyses of polymer ends revealed that the polymerization proceeded via a coordination-acyl-oxygen bond cleavage-insertion mechanism.

参考文献

[1]	Uhrich Kathryn E.;Cannizzaro,Scott M. .Polymeric Systems for Controlled Drug Release[J].Chemical Reviews,1999(11):3181-3198.
[2]	Nonsee Nimitsiriwat;Edeard L.Marshall .Unprecedented Reversible Migration of Amide to Sen iff Base Ligands Attached to Tin:Latent Single-Site Initiators for Lactide Polymerization[J].Journal of the American Chemical Society,2004(42):13598-13599.
[3]	Jin-Cai Wu;Bor-Hunn Huang;Mao-Lin Hsueh;Chu-Chieh Lin;Shu-Ling Lai .Ring-opening polymerization of lactide initiated by magnesium and zinc alkoxides[J].Polymer: The International Journal for the Science and Technology of Polymers,2005(23):9784-9792.
[4]	Brendan J.O'Keefe;Susanne M.Monnier;Marc A.Hillmyer;William B.Tolman .Rapid and Controlled Polymerization of Lactide by Structurally Characterized Ferric Alkoxides[J].Journal of the American Chemical Society,2001(2):339-340.
[5]	Wang XY;Liao KR;Quan DP;Wu Q .Bulk ring-opening polymerization of lactides initiated by ferric alkoxides[J].Macromolecules,2005(11):4611-4617.
[6]	Chamberlain BM.;Pink M.;Hillmyer MA.;Tolman WB.;Jazdzewski BA. .Controlled polymerization of DL-lactide and epsilon-caprolactone by structurally well-defined alkoxo-bridged di- and triyttrium(III) complexes[J].Macromolecules,2000(11):3970-3977.
[7]	Sarah K.Russell;Carolyn L.Gamble;Karen J.Gibbins;Kirsten C.S.Juhl;William S.Mitchell .Stereoselective Controlled Polymerization of DL-Lactide with [Ti(trisphenolate)O-i-Pr]_2 Initiators[J].Macromolecules,2005(24):10336-10340.
[8]	Amanda J.Chmura;Matthew G.Davidson;Matthew D.Jones;Matthew D.Lunn;Mary F.Mahon .Group 4 complexes of amine bis(phenolate)s and their application for the ring opening polymerisation of cyclic esters[J].Dalton transactions: An international journal of inorganic chemistry,2006(7):887-889.
[9]	Lifang Zhang;Zhiquan Shen;Cuiping Yu;Ling Fan .Ring-opening polymerization of D,L-lactide by rare earth 2,6-dimethylaryloxide[J].Polymer international,2004(8):1013-1016.
[10]	FAN Ling,XIONG Yu-Bing,TU Ke-Hua,SHEN Zhi-quan.Ring-opening Polymerization of D,L-Lactide by Lanthanide Tris(2,4,6-trimethylphenolate): Characteristics and Kinetics[J].中国化学(英文版),2005(05):613-616.
[11]	Seishiro Hirano;Kazuo T. Suzuki .Exposure, Metabolism, and Toxicity of Rare Earths and Related Compounds[J].Environmental Health Perspectives,1996(suppl 1):85-95.
[12]	Chamberlain Bradley M.;Hagadorn John R.;Hemmesch Eric W.;Young Victor G. Jr.;Pink Maren;Hillmyer Marc A.;Tolman William B.;Sun Yongping .Discrete yttrium(III) complexes as lactide polymerization catalysts[J].Macromolecules,1999(7):2400-2402.
[13]	Jun Ling .Novel single rare earth aryloxide initiators for ring-opening polymerization of 2,2-dimethyltrimethylene carbonate[J].Macromolecules,2001(22):7613-7616.
[14]	Ling, J;Shen, JG;Hogen-Esch, TE .A density functional theory study of the mechanisms of scandium-alkoxide initiated coordination-insertion ring-opening polymerization of cyclic esters[J].Polymer: The International Journal for the Science and Technology of Polymers,2009(15):3575-3581.
[15]	Francesca M. Kerton;Adrian C. Whitwood;Charlotte E. Willans .A high-throughput approach to lanthanide complexes and their rapid screening in the ring opening polymerisation of caprolactone[J].Dalton transactions: An international journal of inorganic chemistry,2004(15):2237-2244.
[16]	Kurt Dehnicke;Andreas Greiner .Unusual Complex Chemistry of Rare-Earth Elements: Large Ionic Radii—Small Coordination Numbers[J].Angewandte Chemie International Edition,2003(12):1340-1354.

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A Series of Rare Earth Phenolates Substituted by Alkyl Groups for D,L-Lactide Ring-Opening Polymerization

参考文献