Microscopic Fourier Transform Infrared Characterization on Two Types of Spherulite with Polymorphic Crystals in Poly(heptamethylene terephthalate)
✍ Scribed by Kai Cheng Yen; Eamor M. Woo; Kohji Tashiro
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 403 KB
- Volume
- 31
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
FTIR microspectrometry with in situ temperature variation and IR‐peak‐mapping capability, and POM characterization were used to study the crystal distribution in dual spherulites in poly(heptamethylene terephthalate). By tracing the crystalline IR bands of the α‐crystal and β‐crystal to get the crystal distribution, the techniques resolve that the ringed and ringless spherulites comprise α‐ and β‐crystals, respectively. In addition, temperature‐dependent IR analyses on the spots related to the two crystals also reveal the α‐ and β‐crystals melt at 98 and 104 °C, respectively. The ringed and ringless spherulites were proven to be correlated with the α‐ and β‐crystal forms, respectively.
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