On some mechanical effects in glassy polymers attributed to chain entanglements

Abstract

Abstract:The important role of the entanglements in the deformation of high-molecularweight glassy polymers is demonstrated by two phenomena: the build-up of material resistance in polymethylmethacrylate after chain interpenetration and the intrinsic crazing of polycarbonate which is observed when the entanglement network reaches its limits of extension.

Effect of adding a small amount of high molecular weight polyacrylamide on properties of oxidized cassava starch

“…As a result, the mechanical properties of the blend material are enhanced. Kausch and Dettenmaier (1982) presented that the ultimate strain and energy of fracture for glassy polymers strongly depend on the presence of entanglements. As the chains in blends reach a length longer than that of the critical molecular weight M c , the molecules can form a coherently entangled physical network.…”

Theoretical and Experimental Second Harmonic Generation Studies of the Rotational Elastic Response of a Dye Molecule in a Random Copolymer of Styrene and Methyl Methacrylate

“…k0 + k+ 2K (12) where x + y + c = 1, and kc is the elastic constant represented by the probe molecule pinned by another probe molecule.…”