Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 26 for “"dicyclopentadiene"”.
-
Simultaneous three-dimensional printing and frontal polymerization of dicyclopentadiene resin
Made available in DSpace on 2019-08-23T20:48:28Z (GMT). No. of bitstreams: 2 AW-THESIS-2019.pdf: 2581942 bytes, checksum: f25f39006abf6b6f01072739dee5f37a (MD5) LICENSE.txt: 4206 bytes, checksum: 4fc2bb1dd4f3bcaa0e8d3cc711596d1a (MD5) Previous issue date: 2019-04-26
-
Manufacturing of glass-fiber-reinforced dicyclopentadiene-matrix composites via frontal polymerization
The student, Sagar Ketan Vyas, accepted the attached license on 2020-03-05 at 10:28.
-
Characterization of poly(dicyclopentadiene-co-dihydrofuran) polymers and composites: A frontally polymerizable and deconstructable thermoset
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
-
Polymer Chemistry for Improved Self -Healing Composite Materials
… ring-opening metathesis polymerization of endo-dicyclopentadiene using Grubbs' catalyst. The work herein describes improvements made to this original material. An improved technology is described which protects and delivers the catalyst within wax microspheres. This technique leads to greatly …
-
Development of Self -Healing Polymer Composites and Photoinduced Ring -Opening Metathesis Polymerization
… demonstrated. Polymerization of norbornene and dicyclopentadiene has been performed, showing the simplicity and ease of this procedure. The resulting poly(norbornene) shows high trans content (85%) of the ring opened double bonds. Crosslinked poly(dicyclopentadiene) can be generated at room …
-
Supercritical Fluids: Kinetic Solvent Effect and the Correlation of Solid-Fluid Equilibria
… Data are presented for the cracking of dicyclopentadiene in supercritical butane at 433 K in the pressure range of 42-169 bar. Both reactions were studied in a supercritical chromatograph packed with Porasil A. The dimerization slows with increasing density whereas the cracking reaction …
-
Novel tricycloundecane derivatives as potential N-methyl-Daspartate receptor and calcium channel inhibitors for neuroprotection
… reaction between p-benzoquinone and monomerised dicyclopentadiene yielded tricycloundeca- 4,9-diene-3,6-dione which was used as the base structure and further derivatised. These derivatives were conjugated with benzylamine to form a series of imines and amines. A total of 10 compounds were …
-
Retro-Diels-Alder routes to 4,5 disubstituted cyclopentenones
… to tricyclodecadienone derived from dicyclopentadiene and gave 5-exo-substituted tricyclodecadienones. Attempts to alkylate the kinetic lithium, copper and quaternary ammonium enolates generated from 5-exo-substituted tricyclodecadienones with alkylhalides were unsuccessful. Even in …
-
Solvent-based self-healing polymeric materials
… polymerization (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 …
-
Metal-Free Photoredox-Mediated Ring Opening Metathesis Polymerization
… Interestingly, 2-chloro-2,3-dihydro-endo-dicyclopentadiene did not copolymerize. Monitoring the homopolymerization revealed a low rate of conversion and a sigmoidal shape to the conversion vs. time plot, which is consistent with slow initiation kinetics. Each of these polar monomers can …
-
Approaches to the synthesis of diazabiphenylenes
Cyclopent-2-enone was prepared from either dicyclopentadiene or cycopentanone, and then converted to the photodimer cis,trans,cis-tricyclo[5,3,0,0 2,6]decane-3,8- dione. A limited investigation was conducted into the Beckmann rearrangement of the dioxime(s) of this diketone and polyphosphoric acid …
-
Reductions by Cobalt-Catalyzed Production of Hydrogen Gas from NaBH4 in a Two-Chamber System
… 9-decen-1-ol, and dicyclopentadiene to the corresponding saturated compounds was achieved. <em>p</em>-Nitroaniline, 1-azido-4-methoxybenzene, and 5-azido-2-methoxypyrimidine<strong> </strong>were reduced to the corresponding amines. Dehalogenation of …
-
Self-healing of delamination damage in glass/epoxy composites using catalyst functionalized fibers
… damage is initiated 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 …
-
Self-sealing of thermal fatigue and mechanical damage in fiber-reinforced composite materials
… weave E-glass/epoxy 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 …
-
Rapid fabrication of polymers and composites via frontal polymerization
… metathesis 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 …
-
Self-healing of high temperature cured epoxy and composites
… using a proven 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) …
-
Rapid on-demand polymerization for multifunctional materials
… Prior FROMP studies 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 …
-
Advanced manufacturing of sustainable materials
… metathesis 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 …
-
Dynamic remodeling and rapid manufacturing of functional materials by ring-opening metathesis polymerization
… manner. Since only exo- and endo-dicyclopentadiene have been reported as FROMP monomers, Chapter 4 expands the scope of monomers and builds the structure-property relationship to guide functional materials design. We investigated 30 strained cyclic olefins and correlated FROMP …
-
Novel encapsulation technologies for small size-scale self-healing applications
… metathesis polymerization reaction between dicyclopentadiene and Grubb’s catalyst is especially important to self-healing applications and provides a model system that uses both encapsulated liquid and solid healing agents. DCPD is encapsulated in polyureaformaldehyde (PUF) capsules while …
Page 1 of 2