| Автор | G Farrow |
| Автор | I M Ward |
| Дата выпуска | 1960-12-01 |
| dc.description | X-ray and nuclear magnetic resonance (n.m.r.) measurements of crystallinity have been made over a wide temperature range on oriented and unoriented samples of polyethylene terephthalate. The results show that, although in general terms, no correlation exists between the two methods, above the glass transition a considerable proportion of the non-crystalline regions achieve molecular mobility. The n.m.r. method gives higher values of crystallinity than the X-ray method. This is apparently due to some of the non-crystalline material being immobilized owing to entanglements, and the presence of surrounding crystallites for this material will make a contribution to the broad component of the n.m.r. signal which is used as a measure of the crystalline fraction of the polymer. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Comparison of X-ray and nuclear magnetic resonance measurements of crystallinity in polyethylene terephthalate |
| Тип | paper |
| DOI | 10.1088/0508-3443/11/12/304 |
| Print ISSN | 0508-3443 |
| Журнал | British Journal of Applied Physics |
| Том | 11 |
| Первая страница | 543 |
| Последняя страница | 546 |
| Аффилиация | G Farrow; Imperial Chemical Industries Ltd., Fibres Division, Harrogate, Yorkshire |
| Аффилиация | I M Ward; Imperial Chemical Industries Ltd., Fibres Division, Harrogate, Yorkshire |
| Выпуск | 12 |
