Abstract
Using in-house synthesized poly(dodecamethylene terephthalate) (P12T) as a model, periodic extinction-banded spherulites melt-crystallized at high Tcs (100–115 °C) are expounded in terms of growth mechanism. The extinction-banded spherulites wildly differing from the usual blue/orange double ring-banded spherulites are composed of all flat-on discrete single-crystalline lamellae packed like roof shingles (or fish scales) along the circularly curved bands and the lamellae in the extinction bands are flat with a lozenge shape with no continuous twisting at all. For P12T films of more than 10 µm crystallized at Tc = 105–115 °C, no periodic bands were seen, and all spherulites were ringless, where periodic growth precipitation of crystals to extinction does not occur until impingement. Extinction bands in the P12T spherulites with the inter-ring spacing steadily decrease with decreasing film thickness, because for thinner films (submicrons to 2 µm), draining or depletion of available molten species takes place more frequently, leading to bands of smaller inter-ring spacing. The petal-like extinction bands are discussed and analyzed in detail using 3D AFM imaging.
| Original language | English |
|---|---|
| Pages (from-to) | 601-611 |
| Number of pages | 11 |
| Journal | Journal of Polymer Science, Part B: Polymer Physics |
| Volume | 55 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2017 Apr 1 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Polymers and Plastics
- Materials Chemistry
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Periodic extinction bands composed of all flat-on lamellae in poly(dodecamethylene terephthalate) thin films crystallized at high temperatures. / Lugito, Graecia; Woo, Eamor M.; Chang, Shih Min.
In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 55, No. 7, 01.04.2017, p. 601-611.Research output: Contribution to journal › Article
TY - JOUR
T1 - Periodic extinction bands composed of all flat-on lamellae in poly(dodecamethylene terephthalate) thin films crystallized at high temperatures
AU - Lugito, Graecia
AU - Woo, Eamor M.
AU - Chang, Shih Min
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Using in-house synthesized poly(dodecamethylene terephthalate) (P12T) as a model, periodic extinction-banded spherulites melt-crystallized at high Tcs (100–115 °C) are expounded in terms of growth mechanism. The extinction-banded spherulites wildly differing from the usual blue/orange double ring-banded spherulites are composed of all flat-on discrete single-crystalline lamellae packed like roof shingles (or fish scales) along the circularly curved bands and the lamellae in the extinction bands are flat with a lozenge shape with no continuous twisting at all. For P12T films of more than 10 µm crystallized at Tc = 105–115 °C, no periodic bands were seen, and all spherulites were ringless, where periodic growth precipitation of crystals to extinction does not occur until impingement. Extinction bands in the P12T spherulites with the inter-ring spacing steadily decrease with decreasing film thickness, because for thinner films (submicrons to 2 µm), draining or depletion of available molten species takes place more frequently, leading to bands of smaller inter-ring spacing. The petal-like extinction bands are discussed and analyzed in detail using 3D AFM imaging.
AB - Using in-house synthesized poly(dodecamethylene terephthalate) (P12T) as a model, periodic extinction-banded spherulites melt-crystallized at high Tcs (100–115 °C) are expounded in terms of growth mechanism. The extinction-banded spherulites wildly differing from the usual blue/orange double ring-banded spherulites are composed of all flat-on discrete single-crystalline lamellae packed like roof shingles (or fish scales) along the circularly curved bands and the lamellae in the extinction bands are flat with a lozenge shape with no continuous twisting at all. For P12T films of more than 10 µm crystallized at Tc = 105–115 °C, no periodic bands were seen, and all spherulites were ringless, where periodic growth precipitation of crystals to extinction does not occur until impingement. Extinction bands in the P12T spherulites with the inter-ring spacing steadily decrease with decreasing film thickness, because for thinner films (submicrons to 2 µm), draining or depletion of available molten species takes place more frequently, leading to bands of smaller inter-ring spacing. The petal-like extinction bands are discussed and analyzed in detail using 3D AFM imaging.
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U2 - 10.1002/polb.24304
DO - 10.1002/polb.24304
M3 - Article
AN - SCOPUS:85013661487
VL - 55
SP - 601
EP - 611
JO - Journal of Polymer Science, Part B: Polymer Physics
JF - Journal of Polymer Science, Part B: Polymer Physics
SN - 0887-6266
IS - 7
ER -