Tap or click steps to mark as complete. 1  Cut 1/2-inch-thick slice from rounded bottom of watermelon half to prevent it from rolling around. Scoop watermelon pulp into large bowl; reserve shell. 2  Pour 2 cups juice into saucepan; bring to boil. Remove from heat. 3  Refrigerate 45 min. or until thickened, stirring every 15 min. Pour into watermelon shell.
For ânylonâ strings, manufacturers typically use polymers comprised of amide functional groups such as aliphatic polyamides (including Nylon 6 and Nylon 66), and polymers comprised of ketone functional groups such as Zyex (AKA polyetheretherketone, or PEEK).
The resulting nylon is named on the basis of the number of carbon atoms separating the two acid groups and the two amines. Thus nylon 6,6 which is widely used for fibers is made from adipic acid and hexamethylene diamine. The two compounds form a salt, known as nylon salt, an exact 1:1 ratio of acid to base. This salt is then dried and heated under vacuum to eliminate water and form the polymer.