Abstract
We wish to report a fibrillar to lamellar transformation occurring in highly stretched (∼800%) thin films of natural pale crepe rubber when they are further supercooled to below room temperatures in the stretched state. The fibrillar crystals initially present throughout the stretched rubber at room temperature are oriented along the stretch direction. Upon cooling, the fibrils are replaced by crystals oriented perpendicular to the stretch direction. Since it is a well established fact that natural rubber is almost fully crystallized upon stretching to high elongations at room temperatures, attaining its near maximum crystallinity of about 30%, the change in morphology must then be primarily due to some sort of molecular rearrangement (recrystallization) process in the extended solid state.
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Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
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