My comments apply to ALL "addition"-type polymers, a group which includes acrylates, vinyls, polyesters, methacrylates, and vinyl esters. Modification of these polymers (with materials such as urethanes, to produce 2nd generation products as mentioned above) can indeed dramatically influence...
pmkPE,
I'm not an engineer, but as I understand it when a joint is specified the engineer typically applies a large "safety factor" to the design--in other words, if a joint strength of, say, 1000psi is required, the spec may call for a minimum of 3000psi, yielding a "safety factor" of 3:1. The...
I am an epoxy chemist with over 20 years experience. Our company also makes polyester adhesives, so I know both technologies quite well. Epoxies do indeed have much better longevity than polyesters and acrylics, primarily due to the fact that their shrinkage rates are just a small fraction of...
