β Scribed by Glotin, M. ;Domszy, R. ;Mandelkern, L.
No coin nor oath required. For personal study only.
An analysis of the Raman internal modes of diluteβsolutionβcrystallized homopolymers and coβpolymers of ethylene has been made, similar to the work previously reported for the bulkβcrystallized polymers. The crystallite structure can be described in terms of the relative amounts of the crystalline orthorhombic phase, the liquidlike amorphous phase, and the interfacial region. These quantities change with the molecular constitution of the chains and the crystallization conditions. The level of crystallinity decreases significantly with increasing counit content as would be expected. In addition, an appreciable interfacial structure develops in copolymers as compared with the homopolymers. A possible relationship between the interfacial content and the relaxation transitions in polyethylene is discussed.
π SIMILAR VOLUMES
The diacetylenic lipid, 1,2-bis-(tricosa 10,12 diynoyl)-rac-glycero-3-(-p-toluene-sulfonate), which is related to the tubule-forming lipid, 1,2-bis-(tricosa 10,12 diynoyl)-sn-glycero-3-phosphocholine, has been synthesized and crystallized. The monoclinic crystal structures were polymerized by UV lig