Crystal orientation in a semicrystalline polymer in relation to deformation of spherulites
| Autor: | Shoji Suehiro, Akira Asanuma, Shunji Nomura, Hiromichi Kawai |
|---|---|
| Rok vydání: | 1971 |
| Předmět: |
Diffraction
Materials science Condensed matter physics Deformation (meteorology) Condensed Matter::Soft Condensed Matter Crystal Orientation (vector space) Condensed Matter::Materials Science Crystallography Reciprocal lattice Lamella (surface anatomy) Spherulite Condensed Matter::Superconductivity Crystallite |
| Zdroj: | Journal of Polymer Science Part A-2: Polymer Physics. 9:1991-2007 |
| ISSN: | 1542-9377 0449-2978 |
| DOI: | 10.1002/pol.1971.160091105 |
| Popis: | A mathematical development interrelating the orientation distribution functions of three kinds of orientation units for a polymer spherulite (i.e., a crystal lamella, a crystallite, and a given reciprocal lattice vector of the crystallite) is formulated on the basis of series expansions of the distribution functions in generalized spherical harmonies. Two types of uniaxial deformation models of a polyethylene spherulite, taking account of micronecking and untwisting of crystal lamellae, and of chain tilting and untwisting of crystal lamellae, respectively, both in addition to affine deformation of the lamellae are discussed. The models are tested by comparison of the theoretical orientation distribution functions of some reciprocal lattice vectors of the crystallite with the results of x-ray diffraction experiments. |
| Databáze: | OpenAIRE |
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