Compatibilization of Poly(Trimethylene Terephthalate)/Polycarbonate Blends by Epoxy. Part 2. Melting Behavior and Spherulite Morphology
| Autor: | Yong-Liang Yu, Hoe H. Chuah, Chang‐Hua Geng, Jing Sheng, Mei‐Ling Xue |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Recrystallization (geology) Polymers and Plastics General Chemistry Compatibilization Epoxy Condensed Matter Physics law.invention chemistry.chemical_compound Spherulite chemistry law visual_art Materials Chemistry visual_art.visual_art_medium Polymer blend Crystallization Composite material Polycarbonate Glass transition |
| Zdroj: | Journal of Macromolecular Science, Part B. 44:331-343 |
| ISSN: | 1525-609X 0022-2348 |
| DOI: | 10.1081/mb-200056631 |
| Popis: | The melting behaviors of poly(trimethylene terephthalate)/polycarbonate (PTT/PC) blends, compatibilized by epoxy, and PTT spherulite morphology in the blends were investigated. When epoxy was present during blending, the melting behaviors of PTT/PC blends changed substantially; glass transition temperatures (Tg's) and cold crystallization temperature (Tcc's) of the PTT‐rich phase shifted to higher temperatures, while Tm's shifted slightly to lower temperatures, indicating that epoxy suppressed considerably all processes of dynamic movements pertinent to molecular (or segmental) movements. The cold crystallization process responded sensitively to thermal history. Changes of Tcc's with composition suggested that the epoxy's compatibilization effect was pronounced when PTT and PC were in near equal content. Recrystallization or reorganization exotherms appeared before melting for isothermally crystallized PTT/PC and PTT/PC epoxy (E) blends. A wide angle X‐ray diffraction (WAXD) analysis showed that, although... |
| Databáze: | OpenAIRE |
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