Composite matrix resin

Adhesive bonding is an integral part of virtually all composite structure. Early composite matrix resins could in some cases act as an adhesive, such as with self-filleting systems used for honeycomb sandwich fabrication. As composite systems became more optimized for minimum resin content and limited flow, supplementary adhesives became more common. Modern-day composite structure relies on adhesives almost as much as bonded metallic structure. 

Following this initial period of polyimide development, interest reached a steady-state and remained there until the late 1970s. During this time a major impetus to the polyimide area was provided by the aerospace industry. The need for composite matrix resins as well as structural adhesives with excellent oxidative and thermal stability appeared to be at least partially met by polyimide type resins. Ultimately, requirements of high flow and low void content in relatively thick parts directed these efforts into different directions. Another upswing occurred in the early 1980s with the potential application of... 

Parker et al. (30) reported the synthesis of phosphorous containing bismaleimides and demonstrated their outstanding non-flammability characteristics. Graphite fabric composites prepared from such P-containing BMI as a matrix resin show a LOI of 100 and an anaerobic char yield of 88% at 700 °C. Other P-containing BMI have recently been synthesized (31) for example, bis(3-maleimidophenoxy-4-phenyl)phenyl phosphine oxide (Figure 8) has been tested as a composite matrix resin with the aim of improving the fibre/resin interfacial adhesion. 

The PMR-15 chemistry looks very straightforward and ideal for the application as a composite matrix resin. In addition, the starting monomers are readily available and cheap. The fact that the imidization reaction, which forms the prepolymer at moderately low temperatures, could be separated from the crosslinking reaction was thought to be the key to easy laminate processing and void free laminates. However, after more than twenty years of research and development, it is known that both reactions are very complex and dependent... 

A family of acetylene-terminated phenyl quinoxalines have been synthesized by the Polymer Branch of the Materials Laboratory. ( 1) These phenyl quinoxalines are remarkable for their thermooxidative stability and resistance to moisture. These materials have potential for structural applications as adhesives or composite matrix resins.(2) The feature of moisture resistance makes the materials especially attractive for bonding aluminum. However, problems arise from the fact that aircraft aluminum alloys (and their surface oxiges) are altered by exposures to temperatures above 177 C (350 F) and this is much lower than the polymerization temperatures of the acetylene-terminated oligomers. 

Polyester resins (alkyds) were commercialized for coatings use in 1926, and unsaturated polyesters were used as thermoset fiberglass composite matrix resins in the 1940s, but the early resins made poor adhesives. When flexibilized resins appeared in the 1950s, they were used as adhesives. Today, unsaturated polyesters are widely used as adhesives for thermoset plastics bonding, and even for metal bonding in most countries, but are seldom used as adhesives in the United States, where the more expensive epoxy adhesives are used in similar applications. The saturated polyesters, used as thermoplastic hot-melt adhesives, seem to have appeared in the literature first in the 1954—1957 period. 

It is economically and synthetically more favorable than other routes and allows a facile variation of the chemical structure, because a large variety of activated aromatic dihalides are available. The polymers are useful as composite matrix resins for aircraft and dielectric interlayers in electronic devices. ... 

CLASS Polyimides thennoset resins addition polyimides composite matrix resins STRUCTURE O O... 

Composite matrix resin Conjugated and other unsaturated polymers Polyacetylene Polyaniline... 

Chin J W, Aouadi K, Haight M R, Hughes W L and Nguyen T (2001), Effects of water, salt solution and simulated concrete pore solution on the properties of composite matrix resins used in civil engineering applications , Polym Compos, 22, 282-298. doi 10.1002/pc. 10538... 

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