Chains flexible, wetting from

From my work in surface and colloid chemistry, I was aware of the energetics and mechanics of wetting and spreading. It followed that cis-compounds with their greater entropy of fusion and flexibility must always spread better and stay tackier on the surface under a given set of conditions. I discussed this with Dr. Mark during an afternoon stroll in 1951. He agreed and also pointed out that cis-chains with their more... 

Flexible chain molecules can be spun by the melt, dry- or wet-spinning processes from the melt or from sufficiently concentrated solutions. Examples are poly(ethylene), it-poly(propylene), poly(acrylonitrile), poly(oxymethyl-ene), and aliphatic polyamides. All of these chain molecules have only low potential energy barriers for conformation transitions in addition, they crystallize readily to lamellar structures with chain folding. Crystallization, however, is not a precondition for filament formation since, for example. 

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