Surface Stress Effects on the Bending Direction and Twisting Chirality of Lamellar Crystals of Chiral Polymer
Citations Over TimeTop 10% of 2010 papers
Abstract
Expression of chirality in the highly ordered assembly structures of various types of natural and synthetic materials is still a mystery. Although surface stresses have been known to widely exist in polymer lamellae, how they affect the twisting chirality is yet an unsolved issue. Here we report inversion of the lamellar twisting chirality of microbial poly(R-3-hydroxybutyrate) copolymers from left-handed to right-handed via copolymerization or blending, with the molecular chirality and the structures in the crystalline core unchanged. We interpret the observed inversion of twisting chirality and the complicated lamellar curvature with a continuum model based on surface elasticity theory. Quantitative simulations reveal that the distribution of the anisotropic surface stresses and the surface elasticity property of the lamellae significantly affect the morphological chirality of lamellar twisting. For different chiral polymers, the same bending direction may correlate to the opposite twisting chirality.
Related Papers
- → The enhanced tensile property by introducing bimodal size distribution of lamellar O for O+B2 Ti2AlNb based alloy(2013)71 cited
- Lamellae growth in fully lamellar TiAl alloys and its factors(2003)
- → THE INVESTIGATION ON LAMELLAR MICROSTRUCTURE TRANSFORMATION AND STABILITY IN TIAL BASED INTERMATELLICS(2010)
- EFFECT OF HEATING SHOCK ON THE MICROSTRUCTURE OF γ-TiAl BASE ALLOY(2008)
- EFFECTS OF LAMELLAR SPACING ON THE CREEP BEHAVIOR OF A CAST TiAl ALLOY WITH FULLY LAMELLAR STRUCTURE(2001)