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Showing 1 to 20 of 42 for “"Thermosets"”.
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Critical thickness in silicone thermosets
… a critical dimension" is validated for silicone thermosets and polystyrene using novel "direct" methods by measuring failure strain in thin films. A discussion on polymer intrinsic deformation mechanisms is presented. Using these intrinsic deformation mechanisms as bases, it is argued that all …
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Morphology Development and Fracture Properties of Toughened Epoxy Thermosets
The phase separation process of a rubber modified epoxy system during cure was analyzed by a model developed on the basis of a thermodynamic description of binary mixture and constitutive equations for nucleation and growth rates. As epoxy resins are cured, rubber molecules are precipitated from …
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Inter-Relationships Between Chemistry, Network Structure and Properties of Chain Growth Dimethacrylate Thermosets
Dimethacrylate oligomers diluted with styrene reactive diluents (so-called vinyl ester resins) are becoming increasingly important for composites in applications such as transportation vehicles, printed wiring boards and civil infrastructure. This research has focused on the generation and …
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Design of bio-based and dynamic epoxy thermosets for sustainable 3D printing via Liquid Deposition Modeling
L'abstract è presente nell'allegato / the abstract is in the attachment
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I. Macromolecular and architectural effects on the polymerization of α-helices & II. Functional ROMP curing polyester thermosets
… polymers as multi-functional crosslinkers for thermosets was also demonstrated, incorporating the small molecules 4-dimethylaminopyridine as an agent to limit the curing at room temperature.
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Novel Novolac-Phthalonitrile and Siloxane-Phthalonitrile Resins cured with low melting Novolac Oligomers for Flame Retardant Structural Thermosets
The chemical modification of low molecular weight novolac oligomers and siloxane/silane-containing monomers has led to novel phthalonitrile derivatives with low glass transition temperatures, ranging from -25 to 75 ºC. Multi-functional, low molecular weight phenol-formaldehyde novolac resins were …
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Examination of the Aging Properties of Novel Cyanate Ester Thermosets and the Subsequent Evaluation of the Material under Application Conditions
Cyanate ester thermosetting resins are a novel family of materials for high technology and aerospace applications. The high glass transition temperatures available from cured cyanate ester networks and subsequently, their resistances to corrosive materials make these resins attractive for harsh …
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I. Kinetic and mechanistic studies of dynamic alkyne metathesis and II. Towards regenerative thermosets using frontal ring-opening olefin metathesis polymerization
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Design and Synthesis of Polymer Networks and Branched Polymers for Triggered Deconstruction of Self-Assembly
… held together by permanent covalent crosslinks–thermosets, which make up 20% of all plastics–cannot generally be reprocessed or broken down. Generalizable strategies for the deconstruction and/or reprocessing of thermoset materials are therefore severely lacking and highly desirable. Here, we …
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Synthesis and characterization of vanillyl alcohol based thermosetting epoxy resins
… the production of renewable bisphenols and epoxy thermosets. A new bio-based bisphenol (bisguaiacol) was synthesized via electrophilic aromatic condensation of vanillyl alcohol and guaiacol, from which diglycidyl ether of bisguaiacol (DGEBG) was prepared via epoxidation with epichlorohydrin.The …
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Hydrogen bonding as it relates to miscibility of high performance poly(arylene ether)s with epoxy resins
… functional groups for use as tougheners in epoxy thermosets followed by evaluation of the miscibility of the poly(arylene ether) materials in cured epoxy thermosets. Poly(arylene ether)s were synthesized by reaction of bisphenol A with a variety of dihalo monomers including 4,4’ …
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Advances in the Synthesis and Application of Dynamic Covalent Polymer Networks
… strategy. Thermoplastics (linear polymers) and Thermosets (crosslinked polymer networks) are two main categories of plastic materials. Thermosets have excellent chemical stability, strength, and durability but cannot be recycled. On the other hand, thermoplastics are recyclable, but this comes …
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Synthesis, properties, and morphology of lignin based epoxy resins
… with meta phenylene diamine yielding thermosets which were, depending on lignin content, either low modulus elastomers, or high modulus materials with considerable ductility. The modulus of elasticity was a strong and linear function of lignin content, whereby the highest value was …
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Synthesis and Characterization of Phenylethynyl Terminated Poly(arylene ether sulfone)s as Thermosetting Structural Adhesives and Composite Matrices
… attempts to prepare poly(arylene ether) based thermosets to improve solvent resistance have been largely unsuccessful due to processiblity issues from the low curing temperature and high glass transition temperature of the thermoset precursor. Incorporation of a high temperature curable (* …
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Multicomponent network and linear polymer systems: thermal and morphological characterization
… work, two such systemsone involving modified thermosets and the other involving thermoplastic polymer blends, have been studied with regard to their morphological and thermal properties. Both systems take the advantage of not only the physical interactions between the components involved but …
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Sacrificial polymers for rapid manufacturing of bioinspired vascular materials
… stresses during integration into structural thermosets and fiber-reinforced polymer composites (FRPCs). Catalyst-assisted thermal depolymerization of poly(lactic acid) (PLA) templates containing an organometallic compound enables manufacturing of complex vasculature in thermosets and FRPCs …
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Hindered urea bond for the design of dynamic materials
… of self-healing polymeric elastomers/malleable thermosets through bond exchange and hydrolyzable polymers through quenching of dissociative intermediate – isocyanate. HUB shows many advantages in dynamic materials designs compared with other DCB systems in terms of simplicity, dynamicity, …
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Structural design of waste-thermoplastic wind turbine blade
… led to the testing of thermoplastics to replace thermosets in the composite; thus making recycling possible. Another challenge, waste plastics of which 55% of all plastics produced in 2015 were discarded into the environment. Utilising waste thermoplastics for producing wind turbine blades may …
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Designing Macromolecules using Machine Learning and Simulations
… from peptides and glycans, to electrolytes and thermosets.
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Active dynamic response tuning of adaptive composites utilizing embedded nitinol actuators
… of nitinol for use as constrained thermosets is performed and the results are used in the mathematical model. The mathematical model is used to calculate the natural frequencies of clamped-clamped nitinol composite beams and the results are compared to experimental results. It is …
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