Experimentally- and theoretically-evaluated ultimate 3-dimensional elastic constants of trans-1,4-polyisoprene α and β crystalline forms on the basis of the newly-refined crystal structure information |
| |
Authors: | Paramita Jaya Ratri Kohji Tashiro Masatoshi Iguchi |
| |
Affiliation: | 1. Department of Future Industry-oriented Basic Science and Materials, Toyota Technological Institute, Tempaku, Nagoya 468-8511, Japan;2. Shakujii 4-15-21, Nerima, Tokyo 177-0041, Japan |
| |
Abstract: | The ultimate 3-dimensional elastic constants and compliance tensors have been evaluated for trans-1,4-polyisoprene (Gutta percha) α and β crystalline forms experimentally and theoretically. The theoretical estimation was performed by the molecular mechanics method on the basis of the newly-refined atomic coordinates obtained by quantitative analysis of the crystal structures using many numbers of X-ray reflections from the highly-oriented and highly-pure α and β crystalline samples. The calculated Young's modulus along the chain axis was 85.8 GPa for the α form and 72.3 GPa for the β form, in good agreement with the experimentally-obtained X-ray crystallite moduli, 72.4 GPa and 61.4 GPa, respectively. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|