Large Deformation of Crystalline Polymers

Multiscale Modeling of the Deformation of Semi-crystalline Polymers

Rheology of liquid crystalline polymers

Concepts which may be used in interpreting the complex rheology of liquid crystalline polymers are reviewed. Some of them are taken from the nematodynamics of low molecular weight liquid crystals as described by the Leslie—Ericksen theory, others are intrinsic to the viscoelasticity of ordinary polymers. Tentatively, these concepts are used to construct an explanation of the band texture which ...

Phase Transitions and Structure Of Crystalline Polymers

Crystalline polymers build up complex structural entities, which blend amorphous and crystalline domains at a very small scale (≈ 10 nm). The coexistence of domains, which are of molecular, dimensions stems from the fact that the chains tend to fold upon crystallisation: this chain folding is a characteristic feature of polymers, and creates an organisational scale which is unique to polymers. ...

Characterization of Semi-crystalline Polymers Using MRI

H single point magnetic resonance imaging (SPI)[1],[2],[3] has been introduced in the literature as a method for determining relaxation characteristics of semi-crystalline polymers and for extracting MRI images from such samples. The work presented in the literature to date demonstrates the applicability of this technique. In this work, SPI has been applied to the direct observation of stress-i...

Characterization of thermotropic liquid crystalline polymers

The characterization of thermotropic, main chain liquid crystalline polymers for the type, thermal and thermodynamic properties, order, and degree of liquid crystallinity of the anisotropic phase is described through the use of the following methods: (1) polarized light microscopy, (2) wide angle X—ray diffraction, (3) differential scanning calorimetry, (4) small angle light scattering, (5) ele...