Helmholtz-Zentrum Geesthacht Zentrum Fur Material Und Kustenforschung Gmbh

Helmholtz-Zentrum Geesthacht Zentrum Fuer Material- Und Kuestenforschung Gmbh

Mnemoscience Gmbh

Gkss-Forschungszentrum Geesthacht Gmbh

Helmholtz-Zentrum Hereon Gmbh

Massachusetts Institute of Technology

Helmholtz-Zentrum Geesthacht Zentrum Fuer Material Und Kuestenferschung Gmbh

Helmholtz-Zentrum Geesthacht Zentrum Feur Material Und Kuesten Forschung Gmbh

Helmholtz-Zentrum Geestahacht Zentrum Fur Material Und Kustenforschung

Charité – Universitätsmedizin Berlin

Andreas Lendlein

Karl Kratz

Marc Behl

Robert Samuel Langer

Wolfgang Albrecht

Annette Schmidt

Ingo Bellin

Frank Klein

Oliver Jünger

Axel Thomas Neffe

Jorg Zotzmann

Paul Jakob Hommes-Schattmann

Yakai Feng

Steffen Kelch

Robert S Langer, Jr

Thomas Weigel

Friedrich Jung

Tilman Sauter

Srinivasa Reddy Chaganti

Hong-Yan Jiang

Petra Reinke

Armin Alteheld

Karola Lützow

Norbert Fusenig

Ulrich Noechel

Quanchao Zhang

Samy Madbouly

Bernhard Hiebl

Annika Tuleweit

Susi Steuer

Thomas Groth

Andreas Kurtz

Nok Young Choi

Hans-Jürgen Stark

Birgit Schnitter

Peter Simon

Andy R•mhild

Jürgen Schulte

Hans Grablowitz

Reinhard Mohr

Joerg Zotzmann

Ulrike Voigt

Wolfgang Wagermaier

Adam Sisson

Sebastian Seiffert

Duygu Ekinci

Narendra Kumar Uttamchand

Nan Ma

Christian Wischke

Robert S Langer

Friedrich Alfons Jung

Jörg Zotzmann

Fabian Frieß

Ulrich NÖCHEL

Frank Andreas Klein

Andy Römhild

Gregor Boese

Günther Malsch

Yakai School Of Chemical Engineering And Technology Feng

A polymer blend is provided, comprising or consisting of: (A) a first polymer component, being a copolymer having a substantially random, partially blocky structure and selected from poly[(L-lactide)-co-(&#xa3;-caprolactone)] and poly[(D-lactide)-co-(&#xa3;-caprolactone)] and (B) a second polymer component different from the first polymer component (A) selected from poly(L-lactide), poly(D-lactide), poly[(L-lactide)-co-(&#xa3;-caprolactone)] and poly[(D-lactide)-co-(&#xa3;-caprolactone)], wherein the first and second polymer components (A) and (B) are selected such that the resulting polymer blend comprises a combination of constitution units derived from L-lactide and constitution units derived from D-lactide. The highly elastic material may be processed by electrospinning to produce elastic porous objects having a non-woven fibrous structure.

Highly elastic lactide-based polymer blend, object made from the polymer blend and method of producing the object

The invention provides a surface-functionalised polymeric object (), comprising: a bulk material () comprising a copolymer containing constitution units derived from a first comonomer and constitution units derived from a second comonomer, the first comonomer being selected from L-lactide and D-lactide and forming sequences of oligo(L-lactide) or oligo(D-lactide) in the copolymer the copolymer having a substantially random, partially blocky structure with a dyad ratio of (lactide-lactide)-dyads to (lactide-second comonomer)-dyads of at least 2.0:1; and a surface layer () disposed on a surface of the bulk material (), the surface layer () comprising a functionalising species and at least one chain of poly(D-lactide) or of poly(L-lactide) covalently bound to the functionalising species, and at least one chain being different from the oligo(L-lactide) sequences or oligo(D-lactide) sequences contained in the copolymer; wherein the surface layer () is attached to the bulk material () via stereocomplexes formed between the poly(D-lactide) chain(s) of the functionalising species and the oligo(L-lactide) sequences contained in the copolymer or via stereocomplexes formed between the poly(L-lactide) chain(s) of the functionalising species and the oligo(D-lactide) sequences contained in the copolymer, respectively. The surface-functionalised polymeric object can be produced in a one-step procedure by coaxial electrospinning.

Surface-functionalised polymeric object and method of its production

The present invention relates to an article consisting of or comprising a bidirectional shape-memory polymer (bSMP), the bSMP comprising: first phase-segregated domains (AD) having a first transition temperature (T) corresponding to a crystallization transition or glass transition of the first domains (AD), second phase-segregated domains (SD) having a second transition temperature (T) corresponding to a crystallization transition or glass transition of the second domains (SD), the second transition temperature (T) being higher than the first transition temperature (T), and covalent or physical bonds cross-linking the polymer chains of the bSMP, and in this way interconnecting the first and second domains (AD, SD), wherein the second phase-separated domains (SD) form a skeleton which is at least partially embedded in the first phase-segregated domains (AD), and wherein polymer chain segments of the bSMP forming the first domains (AD) are substantially orientated in a common direction, such that the bSMP is able to undergo a reversible shape-shift between a first shape (A) at a first temperature (T) and a second shape (B) at a second temperature (T) upon variation of temperature between the first and second temperature (T, T) driven by the crystallization and melting or vitrification and melting of the first phase-separated domains (AD) and without application of an external stress, with T&#x3c;T&#x3c;T&#x3c;T.

Bidirectional shape-memory polymer, method of its production and its use

The present invention is directed to a method of preparing an actuator capable of being repeatedly and reversibly shifted between two freestanding shapes (A, B) under stress-free conditions upon varying a temperature between a temperature Tand a temperature T. The method comprising the steps:

Method of preparing a bidirectional shape-memory actuator and method of its use

The present invention is related to novel preparative methods to a novel class of polymer network materials with a highly branched poly(glycidyl ether) (PGE) structure. Said polymer networks are prepared by a simple procedure involving ring-opening polymerisation and the method is applicable to a wide range of glycidyl ether containing monomers. The method comprises the step of copolymerising (A) at least one multi-topic glycidyl ether comprising at least three glycidyl ether groups with (B) at least one glycidyl ether component comprising at least one glycidyl ether group by ring opening polymerisation, wherein the multi-topic glycidyl ether (A) is glycerol glycidyl ether (GGE) having the Formula (I) and the glycidyl ether component (B) is selected from monoglycidyl ethers comprising one glycidyl ether group and diglycidyl ethers comprising two glycidyl ether groups. 

Polymer network material comprising a poly(glycidyl ether) structure, method of its production and use

The present invention relates to a method for testing different selected materials and/or surface structures for the culture of cells and/or microorganisms.

Method and kit for testing various selected materials and/or surface structures for culturing cells

The invention relates to a polymer network with triple-shape-memory effect and an associated programming method. The invention also relates to a method for producing layer systems made of shape-memory materials comprising the polymer network. The polymer network includes

Polymer network with triple shape effect and associated programming method

The invention relates to an article () made of a shape memory composite material () comprising a shape memory polymer () and a magnetic material () embedded therein, said shape memory polymer () after thermomechanical programming being capable of undergoing at least one temperature-induced transition from a temporary shape into a permanent shape, as well as to a method for the production thereof and a method for retrieving stored shapes. It is envisaged that the article () has at least two directly or indirectly interconnected sections () which differ by a different surface-to-volume ratio (S/V).

Article made of a shape-memory composite material, method for the production thereof, and method for retrieving stored shapes

The invention relates to a method for programming a shape memory polymer, which comprises at least one switching segment having at least one thermal phase transition and covalent and/or non-covalent cross-linking points such that the shape memory polymer after the programming thereof is in a position to transition from a programmed temporary shape into the permanent shape thereof, following a temperature increase to a temperature that at least corresponds to a switching temperature (T, T). According to the invention, the method comprises (a) predetermining a programming temperature (t) as a function of a desired switching temperature (T, T), (b) heating the shape memory polymer to the predetermined programming temperature (t), and transferring the polymer into a shape that corresponds to the temporary shape by applying a forced molding state, and (c) cooling the polymer to a temperature below the desired switching temperature (T, T) while maintaining the forced molding state.

Method for programming a shape memory polymer while defining the switch temperature by selection of the programming temperature

Described herein are a group of degradable, thermoplastic polymers, which are able to change their shape after an increase temperature. Their shape memory capability enables bulky implants to be placed in the body through small incisions or to perform complex mechanical deformations automatically. The shape memory polymers are preferably biocompatible and can be biodegradable or non-degradable polymers. Preferably, the biodegradable polymer has a linear degradation rate. In a specifically preferred embodiment, the suture is formed of biodegradable polymer capable of forming a self-tightening knot. In a most preferred embodiment, the suture is used to close a wound or body scission.

Biodegradable shape memory polymeric sutures

A method for restoring a programmed article which contains a shape memory composite material of at least one shape memory polymer network with thermally inducible triple shape properties, the method comprising subjecting the article to a magnetic alternating field and simultaneously to an external heat supply in order to trigger the restoration, wherein at least one of the parameters of magnetic field strength (H) and ambient temperature (T) is increased continuously or discontinuously in such a way that the article first experiences a transition in shape from the first temporary shape (TF) into the second temporary shape (TF) and subsequently from the second temporary shape (TF) into the permanent shape (PF).

Method for restoring an article comprising a shape memory composite material

The present invention relates to amorphous photosensitive networks. The networks are characterized by good shape memory properties.

Photosensitive polymeric networks

The present invention provides an article with at least one switching segment. The switching segment comprises a shape-memory compound and an isolating region surrounding the shape memory compound. The present invention also provides a method of producing such an article.

Item with at least one thermoprogrammable switching section for applications in contact with materials having high heat transfer coefficients

The invention relates to a method for producing a programmed shape memory polymer, which assumes a first temporary shape and at least two additional stored thermally activatable shapes, namely at least one second temporary shape and a permanent shape, with the steps of:

Method for the one-step programming of the three-shape plastics

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Berlin, Germany

Andreas Lendlein