Prof. Dr. Hans R. Kricheldorf
Institute of Technical and
Macromolecular Chemistry
 

Phone:	+49-40-42838-3168
Fax:	+49-40-42838-6008
e-mail:	kricheld@chemie.uni-hamburg.de


 
 

Curriculum Vitae

Born: 1942, 27th November	Freiburg i. Br.
1961-1969	Studies of Chemistry	University of Freiburg
1969	PhD	University of Freiburg
1975	Habilitation	University of Freiburg
1975	Assistent Professor	University of Freiburg
1980	Associate Professor	University of Freiburg
1982	Full Professor	University of Hamburg
2009	Retirement

 
1. Ring-opening polymerization of lactones, cyclocarbonates and amino acid N-carboxyanhydrides. Preparative aspects and elucidation of reaction mechanisms are studied.
2. Syntheses and evaluation of new catalyst/initiators for ring-opening polymerizations and ring-expansion polymerization, mainly concentrating on the elements Sn, Zn, Mg and Bi.
3. New synthetic strategies.
1. Polycondensations of silylated monomers yielding silicon free polymers. Silylated monomers may be useful for the preparation of polyesters, polyethers, polyamides, polyimides, polybenzoxazoles and polyanhydrides. 
2. Ring-opening polycondensation: Heterocycles having two reactive bonds may be used as difuctional monomers in polycondensation processes. The potential of this new approach is currently under investigation. 
3. Ring-expansion polymerization. Polymerizations of heterocycles such as lactones, cyclic diesters, cyclocarbonates or cyclic urethanes by means of cyclic initiators yields cyclic oligomers and polymers free of any linear species.
4. Syntheses and characterization of biodegradable polymers, such as polyesters, polyanhydrides, aliphatic polycarbonates and polypeptides by new polycondensation methods. In addition to homopolymers, random copolymers and various kinds of blockcopolymers are studied. Furthermore, biodegradable networds are under investigation.
5. Preparation and characterization of biodegradable blends and composites. The reinforcements of matrix materials such as polylactides, poly(?-caprolactone) or poly(?-butyrolactone) by means of helical polypeptides or biodegradable liquid-crystalline polyesters should be studied.
6. Syntheses and characterization of thermoplastic elastomers (TPEs). This working field concentrates: A) on TPEs derived from monodisperse hard segments and monodisperse or polydisperse soft segments. B) on degradable TPEs.
7. In cooperation with hospitals the usefulness of biodegradable materials for new methods of wound treatment, tissue engineering and fixation of bone fractures is under evaluation.
1. Syntheses and characterization of liquid-crystalline polymers. LC-polymers containing imide mesogens and the formation of layerstructures in the liquid and solid state are of particular interest. Furthermore, cholesteric polyester showing interesting and useful optical properties are under investigation. Moreover, biodegradable LC-polyesters are studied.
2. Hyperbranched polymers. Syntheses and Characterization of hyperbranched polyesters, poly(ester-amide)s, poly(ester-imide)s, poly(ether-sulfone) and poly(ether ketone)s are studied. All syntheses are based on "one-     pot-polycondensations" of tri- or tetrafunctional monomers. Furthermore, the direct transformation of the numerous OH-endgroups into functional is of interest. Reactive membranes, coatings and polymeric catalysts are the aim of these studies.
8. Syntheses, reactions and characterization of macrocycles, cyclic oligomers and cyclic polymers are studied. Macrocycles are used as monomers, as initiators or as reactive intermediates. Cyclic polymers up to molecular weight of 100.000 g/mol are under investigation.
 

More than 700 publications in international journals (see Chem. Abstr. and below)

20 Patents

Edition of 4 books (see below)

Selected publications

Ring-opening polymerizations:

 
1. H.R. Kricheldorf, M. Berl, N. Scharnagl, "Polylactones 9. Polymerization Mechanism of Metal Alkoxide-Initiated Polymerizations of Lactide and Various Lactones", Macromolecules 21 286 (1988)
2. H.R. Kricheldorf, M.V. Sambil, I. Kreiser-Saunders "Polylactones 20. Polymerization of ?-Caprolactone with Tributyltin Derivatives: A Mechanistic Study, Macromolecules 24 1944 (1991)
3. H.R. Kricheldorf, I. Kreiser-Saunders "Polylactones 30. Vitamines, Hormones and Drugs as Coinitiators of AlEt3-Initiated Polymerization of Lactide", Polymer 35 4175 (1994)
4. H.R. Kricheldorf, B. Weegen-Schulz, " Polymers of Carbonic Acid 11. Reactions and Polymerizations of Aliphatic Cyclocarbonates with Boron Halides", Macromolecules 26 5991 (1993)

1. H.R. Kricheldorf, S.-R. Lee, "Polylactones 40. Nanopretzels by  Macrocyclic Polymerization of Lactones via a Spirocyclic Tin Initiator Derived from Pentaerythritol", Macromolecules 29 8689 (1996)
2. H.R. Kricheldorf, S. Eggerstedt, "Macrocycles 2. Living Macrocyclic Polymerization of ?-Caprolactone with 2,2-Dibutyl-2-stanna-1,3-Dioxepane", Macromolecules 199 283 (1998)
3. H.R. Kricheldorf, D. Langanke, "Macrocycles 8. Multiblock Copoly(ether-ester)s of Poly(THF) and ?-Caprolactone via Macrocyclic Polymerization", Macromol. Chem. Phys. 200 1183 (1999)
4. H.R. Kricheldorf, A. Stricker, "Macrocycles 13. Stannylenated Glucose Glycosides as Cyclic Initiators of ?-Caprolactone and the Synthesis of Biodegradable Networks", Macromolecules 33 696 (2000)

1. H.R. Kricheldorf, D.O. Damrau, "Polylactones 37. Polymerizations of L-lactide Initiated with Zn(II)L-lactate and other resorbable Zn Salts", Macromol.Chem.Phys. 198 1753 (1997)

1. H.R. Kricheldorf, L. Wahlen, C. Friedrich, T.J. Menke, "Composites 2. Reinforcement of Poly(?-caprolactone) via Lyotropic Blends of Rigid-Rod Polyesters Derived from Substituted Terephthalic Acid", Macromolecules 30 2642 (1997)
2. H.R. Kricheldorf, L. Wahlen, K. Chen, "Reinforcement of Biodegradable Matrices by Helical Polypeptides", Macromol. Rapid. Commun. 18 569 (1997)

1. C. Jürgen, T. Porte, D. Wolter, H.G.K. Schmidt, H.R. Kricheldorf, I. Kreiser-Saunders, "Entwicklung und  Charakterisierung einer absorbierbaren temporären Wundabdeckung", Unfallchirurg 98 233 (1995)

1. H.R. Kricheldorf, G. Schwarz, A. Domschke, V. Linzer, "Liquid Crystalline Polyimides 15. Role of Conformation and Donor.Acceptor Interactions for the Nematic Order of Poly(ester-imide)s", Macromolecules 26 5161 (1993)
2. H.R. Kricheldorf, "Liquid-Crystalline Poly(ester-imide)s", Adv.Polym.Sci. 141 83 (1999)
3. H.R. Kricheldorf, D. Wulff, "Layer Structures 12. Chiral Sanidic Polyesters Derived from 2,5-bis(hexadecyloxy)terephthalic acid, 2,5-Bis((S)-2-methylbutoxy)terephthalic acid and 4,4´-Dihydroxybiphenyl", Polymer 39 2683 (1998)
4. H.R. Kricheldorf, T. Stukenbrock, "New Polymer Syntheses 92. Biodegradable, Thermotropic Copolyesters Derived from ?-(4-Hydroxyphenyl)propionic acid", Macromol.Chem.Phys. 198 3753 (1997)

1. H.R. Kricheldorf, O. Stöber, D. Lübbers, "New Polymer Syntheses 78. Star-Shaped and Hyperbranched Polyesters by Polycondensation of Trimethylsilyl-3,5-Diacetoxybenzoate", Macromolecules 28 2118 (1995)
2. H.R. Kricheldorf, T. Stukenbrock, "New Polymer Syntheses 90. A-B-A-Triblock Copolymers with Hyperbranched Polyester A-Blocks", J.Polym.Sci., Part A, Polym.Chem. 36 31 (1998)
3. A. Reina, A. Gerken, U. Zemann, H.R. Kricheldorf, "New Polymer Syntheses 101. Liquid-crystalline Hyperbranched and Potentially Biodegradable Polyesters Based on Phloretic Acid and Gallic Acid", Macromol.Chem.Phys. 200 1784 (1999)
4. H.R. Kricheldorf, O. Bolender, T. Wollheim, "New Polymer Syntheses 103. In-Situ Endgroup Modification of Hyperbranched Poly(3,5-dihydroxybenzoate)", Macromolecules 32 3878 (1999)

1. H.R. Kricheldorf, S.-R. Lee, N. Schittenhelm, "Macrocycles 1. Macrocyclic Polymerizations of (Thio)lactones-stepwise Ring Expansion and Ring Contraction", Macromol.Chem.Phys. 199 273 (1998)
2. H.R. Kricheldorf, D. Langanke, J. Spickermann, M. Schmidt, "Macrocycles 10. Macrocyclic Poly(1,4-butane diol-ester)s by Polycondensation of 2-Stanna-1,3-dioxepan with Dicarboxylic Acid Chlorides", Macromolecules 32 3559 (1999)
3. H.R. Kricheldorf, A. Lorenc, J. Spickermann, M. Maskos, "Macrocycles 11. Polycondensations of Aliphatic Dicarboxylic Acid Dichlorides with Catechol or Bistrimethylsilyl Catechol", J.Polym.Sci., Part A, Polym.Chem. 37 3861 (1999)

1. H.R. Kricheldorf, "?-Amino Acid N-Carboxyanhydrides and Related Heterocycles", Springer Verlag, Berlin-Heidelberg-New York 1987
2. H.R. Kricheldorf, "Silicon in Polymer Syntheses", Springer Verlag, Berlin-Heidelberg-New York 1996
3. H.R. Kricheldorf, "Handbook of Polymer Syntheses" (2 Volumes) Marcel Dekker, New York 1992
4. H.R. Kricheldorf, "Progress in Polyimide Chemistry", Adv. Polym. Sci., Vol. 140 and 141, Springer, Berlin, N.Y. 1999