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Showing 1 to 18 of 18 for “"DCPD"”.
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Analyse der Carboxypeptidase D-unabhängigen und -abhängigen Schritte bei der Infektion mit dem Hepatitis-B-Virus der Ente
… ist die Carboxypeptidase D der Ente (dCPD) beschrieben. Sie bindet in einem ungewöhnlichen 2-Stufen-Mechanismus zunächst mit niedriger Affinität an einen Bereich innerhalb von preS (AS 86 - 115), der eine amphipathische alpha-Helix umfasst, und dann linear fortschreitend an N-terminal …
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Rapid on-demand polymerization for multifunctional materials
… focused exclusively on dicyclopentadiene (DCPD) and other norbornene-based monomers, which produce rigid polymers suitable for structural applications. This dissertation describes advances in FROMP which enable the production of a wide range of materials, including elastomers, shape memory …
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Autonomic healing of low-velocity impact damage in woven fiber-reinforced composites
… The self-healing components, dicyclopentadiene (DCPD) microcapsules and wax-encapsulated first generation Grubbs' catalyst microspheres, were premixed into the liquid epoxy, and panels are fabricated using a hand layup technique and compression molding. Low-velocity impact damage was introduced …
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Grenzflächen-kontrollierte Mineralisation von Calciumphosphat
… aus amorphen Calciumphosphat, Brushit (DCPD) oder OCP. Diese wandelte sich dann nach 3 h und 5 h in ein Gemisch, bestehend aus OCP und ein wenig Hydroxylapatit (HAP) um. Die Schlussfolgerung daraus ist, dass das CHOL-HEM in der Lage ist, dass während der Mineralisation entstandene OCP zu …
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Novel encapsulation technologies for small size-scale self-healing applications
… encapsulated liquid and solid healing agents. DCPD is encapsulated in polyureaformaldehyde (PUF) capsules while catalyst is protected in wax particles. Silica coatings, applied using a variety of silica condensation chemistries, help to improve the functionality of liquid-filled capsules. …
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Self-healing of delamination damage in glass/epoxy composites using catalyst functionalized fibers
… by the injection of liquid dicyclopentadiene (DCPD) onto the fracture surface of the functionalized fiber composites whereby the catalyst on the surface of the fibers triggers a ring opening metathesis polymerization (ROMP) reaction in the liquid monomer, healing the interlaminar damage. …
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Self-sealing of thermal fatigue and mechanical damage in fiber-reinforced composite materials
… composite with encapsulated dicyclopentadiene (DCPD) monomer and wax protected Grubbs' catalyst healing components. A controlled amount of microcracking was introduced through cyclic indentation of opposing surfaces of the composite. The resulting damage zone was proportional to the indentation …
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Manufacturing of thermosetting polymers and composites using frontal polymerization: A numerical study
… investigation of FP in a neat Dicyclopentadiene (DCPD) resin, in the absence of fibers. In a continuum-level approach, we numerically solve a reaction-diffusion system of Partial Differential Equations (PDEs) to model the initiation and propagation of polymerization fronts. The second part of the …
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Rapid fabrication of polymers and composites via frontal polymerization
… polymerization (FROMP) of dicyclopentadiene (DCPD) produced a better polymer product, since PDCPD is used industrially for products like truck body panels and agricultural equipment. FROMP had previously been limited by high catalyst loading requirements and short working time (<1 h). We were …
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Self-healing of high temperature cured epoxy and composites
… healing system - encapsulated dicyclopentadiene (DCPD) monomer and Grubbs’ first generation catalyst particles. Both quasi-static fracture and fatigue performance of a self-healing non-toughened epoxy adhesive were evaluated using the width-tapered-double-cantilever-beam (WTDCB) specimen geometry. …
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Calciumphoshatzemente als Antibiotika-freisetzende Knochenersatzwerkstoffe
… die aus den Edukten TTCP und DCPD hergestellt wurden, können nicht ohne weiteres mit Clindamycinhydrochlorid, Gentamicinsulfat und Vancomycinhydrochlorid kombiniert werden, ohne daß die physikalisch-chemischen Eigenschaften der Zementmischungen verändert werden. Bei der …
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Lanthanide luminescence in Pybox functionalized metallopolymers
… This monomer was copolymerized with DCPD and norbornene, also showing that the quantum yields were influenced by coordination site ratios to polymer repeat unit. Mixed Ln(III) metal species were prepared with Eu(III), Tb(III) and Tm(III) resulting in mixed color emission, creating the …
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Solvent-based self-healing polymeric materials
… (ROMP) using encapsulated dicyclopentadiene (DCPD) and wax-protected Grubbs’ catalyst. However the limitations of this system, including catalyst availability, cost, environmental toxicity, stability, and materials processing, motivated the search for a simpler approach to self-healing. Many …
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Sacrificial polymers for rapid manufacturing of bioinspired vascular materials
… polymerization (FP) of a dicyclopentadiene (DCPD) matrix to create vascular thermosets and FRPCs within minutes under ambient conditions. The heat generated during FP of DCPD is sufficient for complete depolymerization of cPPA and PPC fibers and printed templates without an additional …
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Advanced manufacturing of sustainable materials
… polymerization (FROMP) of dicyclopentadiene (DCPD). FROMP copolymers possessed material properties that were comparable with native pDCPD, but they were easily degraded into high-value fragments by hydrolysis. The degradation fragments, which were rich in hydroxyl functionality, were recycled …
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Solvent-based self-healing approaches for fiber-reinforced composites
… IFSS with microencapsulated dicyclopentadiene (DCPD) monomer and Grubbs' 1st Generation catalyst healing agents. The effects of capsule coverage, resin-solvent ratio, and capsule size on recovery of IFSS are also determined, providing guidelines for integration of this healing system into high …
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Πειραματική διερεύνηση της θόλωσης των υδρόφιλων ενδοφθάλμιων φακών
… το διένυδρο φωσφορικό ασβέστιο (CaHPO42H2O, DCPD), το φωσφορικό τριασβέστιο (Ca3(PO4)2, TCP), το φωσφορικό οκτασβέστιο (Ca8H2(PO4)65 H2O, OCP) και ο υδροξυαπατίτης (Ca10(PO4)6(OH)2, HAP). Η διαλυτότητα των κρυσταλλικών αυτών φάσεων και ο υπερκορεσμός των διαλυμάτων καθορίζονται από …
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Additive manufacturing enabled by frontal polymerization
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01