| Title | Determination of glass transitions in novel cellulose polymers by synchrotron wide-angle X-ray scattering |
| Publication Type | Journal Article |
| Year of Publication | 2015 |
| Authors | Tristram, C.J., Ingham B., Williams D.B.G., and Hinkley S.F.R. |
| Journal | Materials Today Communications |
| Volume | 2 |
| Pagination | e49 - e54 |
| Date Published | 2015 |
| ISSN | 23524928 (ISSN) |
| Abstract | Synchrotron wide angle X-ray scattering (WAXS) was used to measure the glass-transition temperature (Tg) values for various cellulosic materials including a novel cellulose ester. WAXS patterns were obtained of films cast on silicon nitride windows. Two strong scattering peaks were observed that correlated with the intramolecular repeating anhydroglucose unit (d=10.6-14.3Å) and an intermolecular packing spacing (d=4.4-4.5Å). Real-time measurements were made during temperature cycling over a range of 80-160°C at 5°C/min. Significant shifts in position, width and area for the peak assigned to the intermolecular arrangement of the pseudo-linear cellulose mixed-ester chains were correlated with temperature. The calculated Tg mid-points correlated well with Tg values determined by differential scanning calorimetry (DSC). This application of temperature-dependent WAXS measurements shows promise for Tg determination in samples where shallow second-order transitions are observed by DSC and where other techniques are not applicable. © 2014 Elsevier Ltd. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84922715338&partnerID=40&md5=e5dbe207870bd4ed108a34b6a9b8dec0 |
| DOI | 10.1016/j.mtcomm.2014.12.004 |
