The effect the curing conditions on the properties of adhesive joints formed using cyanoacrylate-based adhesives is investigated. The temperature dependences of relative rigidity and mechanical loss tangent are studied by torque analysis for poly(ethyl-, allyl-, allyloxyethyl-, allyloxyisopropyl-, propargyloxyethyl-, and propargyl-) cyanoacrylates after their thermal treatment in the temperature range of 20–250°C. The glass transition parameters of polycyanoacrylates and the dependence of the curing intensity on the structure of initial monomers and polymers are determined.
Cyanoacrylate polymers are commercially important materials as structural ad- hesives. They combine rapid curing and high strength and are widely used to bond a diverse range of substrate surfaces, including metals, ceramics, plastics, rubbers, and biologically derived materials. The corresponding monomers were first isolated in 1947 by Ardis at B. F. Goodrich (1). Subsequently, Eastman Ko- dak patented them as adhesive compositions in 1957 (2) and the first commer- cial adhesive formulation, based on methyl 2-cyanoacrylate, was introduced in 1958 (3).
Instant adhesives (cyanoacrylate adhesives ) are one-part solvent-free adhesives that cure immediately at room temperature and offer strong bonding strength. Instant adhesive was first developed in 1949 by Alan E. Ardis at Goodrich Company in the U.S., and was later developed into a product by F. B. Joyner and G. F. Hawkins at Eastman Company and marketed as Eastman 910 in 1959. Since then, various adhesive manufacturers around the world have improved and modified methods of synthesizing the main components, monomer.
Instant Adhesives (cyanoacrylate-based) sets instantly at room temperature, has powerful adhesive strength, has only one easy-to-use component, and contains no dangerous solvents. Development of the adhesive began in 1949 by Alan E. Ardis of Goodrich Corporation in the US. Then in 1959 it was introduced into the market by FB Joyner and GF Hawkins of Eastman Corporation as Eastman 910. Later improvements and modifications of the synthetic method of the major-ingredient monomer were performed by the leading adhesive manufacturers.
As already described in Three Bond Technical News 21, instant adhesives are one-part solvent-free adhesives that cure rapidly through polymerization at room temperature. These adhesives are used in a wide range of applications across various industries as a result of their strong adhesive strength. However, instant adhesives includes some disadvantages: low resistance to heat, water, and impact. Numerous patents and reports have been submitted on methods of improving these properties.
