Abstract
A modified heating device connected to a wedge interferometer is designed to study the influence of temperature on the optical and structural properties along the diameter of undrawn polypropylene fibres. To determine the optical orientation function profile, a model that divides the circular cross section into very small circular zones is suggested. The refractive indices and optical orientation function of each zone are considered assuming there is a constant fully oriented birefringence throughout the fibre. This investigation provides useful information about the structural properties of polypropylene fibres and throws light on its opto-thermal behaviour. The investigation is carried out using multiple-beam interference Fizeau fringes in transmission. Microinterferograms are given for illustration.
| Original language | English |
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| Pages (from-to) | 5331-5341 |
| Number of pages | 11 |
| Journal | Journal of Physics Condensed Matter |
| Volume | 11 |
| Issue number | 27 |
| DOIs | |
| Publication status | Published - 1999 |
| Externally published | Yes |