Crystallization Morphology of Poly(ethylene terephthalate)
碩士 === 元智大學 === 化學工程研究所 === 89 === Crystallization Morphology of Poly(ethylene terephthalate) Student : Chih-Jen Chen Advisor : Dr. T L. Yu Institute of Chemical Engineering Yuan-Ze Iniversity Abstrate Crystallization o...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2001
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| Online Access: | http://ndltd.ncl.edu.tw/handle/09923555448925234819 |
| Summary: | 碩士 === 元智大學 === 化學工程研究所 === 89 === Crystallization Morphology of Poly(ethylene terephthalate)
Student : Chih-Jen Chen Advisor : Dr. T L. Yu
Institute of Chemical Engineering Yuan-Ze Iniversity
Abstrate
Crystallization of poly(ethylene terephthalate)(PET) at high temperature (190℃~230℃) was studied using optical microscope(POM) and small angle laser light scattering . The spherulite of PET crystalline was a negative usual type while it was crystallized at a temperature below 220℃. As PET was crystallized above 220℃than 220℃, the spherulite composed mixture of usual negative type and unusual positive types. The content of unusual positive type increased with increasing crystallization temperature. These result suggest that lamellae molecular chains lie on the surface of spherulite while PET was crystallized at a temperature below 220℃,and more and more lamellae molecular chains stand and tilt on the surface of crystallites as crystallization temperature was increased from
220℃ to 230℃.
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