| Autor: |
Zheng Yong Huang, Fei Peng Wang, Jian Li |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Advanced Materials Research. :589-593 |
| ISSN: |
1662-8985 |
| DOI: |
10.4028/www.scientific.net/amr.1070-1072.589 |
| Popis: |
Commercial poly (vinylidene fluoride) (PVDF) films are uniaxially stretched with varying rates at 110 °C in order to endow PVDF piezo-and pyroelectric by crystalline-phase transition from α to β during the stretching. The crystalline phases are determined by infrared spectroscopy. The β-phase content and its fraction in films increase as a result of stretching with high rates. In addition, higher stretching rates yield a slight increase of γ phase. The crystallite size is evaluated by means of X-ray diffraction. It is found that the β-phase crystallites become smaller with fast stretching, whereas the α-phase crystallites are cracked and disappear at high-speed stretching of 2.5 /min. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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