منابع مشابه
Self-curing with epoxy groups
Isocyanate-free cathodic ED coatings. Most of the resins used in the cathodic electrodeposition (CED) coatings are made from modified epoxy resin and blocked polyisocyanate in which the crosslinking is achieved by polyurethane and polyurea formation. A resin system has been developed that is isocyanate free and avoids not only the toxicity aspect, but also, to a great extent, the weight loss of...
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Curing rates of an epoxy amine system were varied via different curing cycles, and glass-fiber epoxy composites were prepared using the same protocol, with the aim of investigating the correlation between microstructure and composite properties. It was found that the fast curing cycle resulted in a non-homogenous network, with a larger percentage of a softer phase. Homogenized composite propert...
متن کاملOptimal Curing for Thermoset Matrix Composites: Thermochemical Considerations
A design sensitivity analysis is used to optimize the applied wall temperature vs. time in autoclave curing for thermoset matrix composites. The calculation minimizes the cure time and obeys a maximum temperature constraint in the composite. The transient, coupled thermal and cure problem is solved by a finite element method. Design sensitivity information is extracted efficiently from this pri...
متن کاملOptimal Curing for Thermoset Matrix Composites: Thermochemical and Consolidation Considerations
A design sensitivity method is used to find optimal autoclave temperature and pressure histories for curing of thermoset-matrix composite laminates. The method uses a finite element simulation of the heat transfer, curing reaction, and consolidation in the laminate. Analytical sensitivities, based on the direct differentiation method, are used within the finite element simulation to find the de...
متن کاملMolecular Level Interactions in Carbon Nanotube Yarn – Epoxy Matrix Composites
Future high performance structural and multifunctional composites may utilize continuous carbon nanotube reinforcements. The nano-scale interactions between carbon nanotubes and epoxy macromolecules in such composites open new areas of research and technology. Tensile mechanical tests and Dynamic Mechanical Analysis are used here for gaining an initial understanding of such interactions and exp...
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ژورنال
عنوان ژورنال: Journal of Composite Materials
سال: 1983
ISSN: 0021-9983,1530-793X
DOI: 10.1177/002199838301700204