@article{FangYanNoecheletal.2016,
  author    = {Fang, Liang and Yan, Wan and N{\"o}chel, Ulrich and Kratz, Karl and Lendlein, Andreas},
  title     = {Programming structural functions in phase-segregated polymers by implementing a defined thermomechanical history},
  series = {Polymer : the international journal for the science and technology of polymers},
  volume    = {102},
  journal   = {Polymer : the international journal for the science and technology of polymers},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0032-3861},
  doi       = {10.1016/j.polymer.2016.08.105},
  pages     = {54 -- 62},
  year      = {2016},
  abstract  = {Unwanted shrinkage behaviors or failure in structural functions such as mechanical strength or deformability of polymeric products related to their thermomechanical history are a major challenge in production of plastics. Here, we address the question whether we can turn this challenge into an opportunity by creating defined thermomechanical histories in polymers, represented by a specific morphology and nanostructure, to equip polymeric shaped bodies with desired functions, e.g. a temperature-memory, by hot, warm or cold deformation into multiblock copolymers having two partially overlapping melting transitions. A copolyesterurethane named PDLCL, consisting of poly(epsilon-caprolactone) (PCL) and poly(omega-pentadecalactone) (PPDL) crystalline domains, exhibiting a pronounced phase-segregated morphology and partially overlapping melting transitions was selected for this study. Different types of PCL and PPDL crystals as well as distinct degrees of orientation in both amorphous and crystalline domains were obtained after deformation at 20 or 40 degrees C and to a lower extent at 60 degrees C. The generated non-isotropic structures were stable at ambient temperature and represent the different stresses stored. Stress-free heating experiments showed that the relaxation in both amorphous and crystalline phases occurred predominantly with melting of PCL crystals. When the switching temperature, which was similar to the applied deformation temperature (temperature-memory), was exceeded in stress-free heating experiments, the implemented thermomechanical history could be reversed. In contrast, during constant-strain heating to 60 degrees C the generated structural features remained almost unchanged. These findings provide insights about the structure function relation in multiblock copolymers with two crystalline phases exhibiting a temperature-memory effect by implementation of specific thermomechanical histories, which might be a general principle for tailoring other functions like mechanical strength or deformability in polymers. (C) 2016 Elsevier Ltd. All rights reserved.},
  language  = {en}
}
@article{RossbergRottkeSchulzetal.2016,
  author    = {Rossberg, Joana and Rottke, Falko O. and Schulz, Burkhard and Lendlein, Andreas},
  title     = {Enzymatic Degradation of Oligo(epsilon-caprolactone)s End-Capped with Phenylboronic Acid Derivatives at the Air-Water Interface},
  series = {Macromolecular rapid communications},
  volume    = {37},
  journal   = {Macromolecular rapid communications},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1022-1336},
  doi       = {10.1002/marc.201600471},
  pages     = {1966 -- 1971},
  year      = {2016},
  abstract  = {The influence of terminal functionalization of oligo(epsilon-caprolactone)s (OCL) with phenylboronic acid pinacol ester or phenylboronic acid on the enzymatic degradation behavior at the air-water interface is investigated by the Langmuir monolayer degradation technique. While the unsubstituted OCL immediately degrades after injection of the enzyme lipase from Pseudomonas cepacia, enzyme molecules are incorporated into the films based on end-capped OCL before degradation. This incorporation of enzymes does not inhibit or suppress the film degradation, but retards it significantly. A specific binding of lipase to the polymer monolayer allows studying the enzymatic activity of bound proteins and the influence on the degradation process. The functionalization of a macromolecule with phenyl boronic acid groups is an approach to investigate their interactions with diol-containing biomolecules like sugars and to monitor their specified impact on the enzymatic degradation behavior at the air-water interface.},
  language  = {en}
}
@article{ZhangBehlPengetal.2016,
  author    = {Zhang, Pengfei and Behl, Marc and Peng, Xingzhou and Razzaq, Muhammad Yasar and Lendlein, Andreas},
  title     = {Ultrasonic Cavitation Induced Shape-Memory Effect in Porous Polymer Networks},
  series = {Macromolecular rapid communications},
  volume    = {37},
  journal   = {Macromolecular rapid communications},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1022-1336},
  doi       = {10.1002/marc.201600439},
  pages     = {1897 -- 1903},
  year      = {2016},
  abstract  = {Inspired by the application of ultrasonic cavitation based mechanical force (CMF) to open small channels in natural soft materials (skin or tissue), it is explored whether an artificial polymer network can be created, in which shape-changes can be induced by CMF. This concept comprises an interconnected macroporous rhodium-phosphine (Rh-P) coordination polymer network, in which a CMF can reversibly dissociate the Rh-P microphases. In this way, the ligand exchange of Rh-P coordination bonds in the polymer network is accelerated, resulting in a topological rearrangement of molecular switches. This rearrangement of molecular switches enables the polymer network to release internal tension under ultrasound exposure, resulting in a CMF-induced shape-memory capability. The interconnected macroporous structure with thin pore walls is essential for allowing the CMF to effectively permeate throughout the polymer network. Potential applications of this CMF-induced shape-memory polymer can be mechanosensors or ultrasound controlled switches.},
  language  = {en}
}
@article{SchoeneSchulzLendlein2016,
  author    = {Sch{\"o}ne, Anne-Christin and Schulz, Burkhard and Lendlein, Andreas},
  title     = {Stimuli Responsive and Multifunctional Polymers: Progress in Materials and Applications},
  series = {Macromolecular rapid communications},
  volume    = {37},
  journal   = {Macromolecular rapid communications},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1022-1336},
  doi       = {10.1002/marc.201600650},
  pages     = {1856 -- 1859},
  year      = {2016},
  language  = {en}
}
@article{NaolouLendleinNeffe2016,
  author    = {Naolou, Toufik and Lendlein, Andreas and Neffe, Axel T.},
  title     = {Influence of metal softness on the metal-organic catalyzed polymerization of inorpholin-2,5-diones to oligodepsipeptides},
  series = {European polymer journal},
  volume    = {85},
  journal   = {European polymer journal},
  publisher = {Elsevier},
  address   = {Oxford},
  issn      = {0014-3057},
  doi       = {10.1016/j.eurpolymj.2016.10.011},
  pages     = {139 -- 149},
  year      = {2016},
  language  = {en}
}