Reactive Compatibilization of Poly(trimethylene terephthalate)/Polypropylene Blends by Polypropylene‐graft‐Maleic Anhydride. Part 2. Crystallization Behavior
| Autor: | Yong-Liang Yu, Hoe H. Chuah, Mei‐Ling Xue |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Polypropylene
Materials science Polymers and Plastics Kinetics Maleic anhydride General Chemistry Reactive compatibilization Condensed Matter Physics Poly(trimethylene terephthalate) law.invention chemistry.chemical_compound chemistry Chemical engineering law Polymer chemistry Materials Chemistry Polymer blend Crystallization Volume concentration |
| Zdroj: | Journal of Macromolecular Science, Part B. 46:603-615 |
| ISSN: | 1525-609X 0022-2348 |
| DOI: | 10.1080/00222340701258008 |
| Popis: | The crystallization behavior of uncompatibilized and reactive compatibilized poly(trimethylene terephthalate)/polypropylene (PTT/PP) blends was investigated. In both blends, PTT and PP crystallization rates were accelerated by the presence of each other, especially at low concentrations. When PP content in the uncompatibilized blends was increased to 50–60 wt%, PTT showed fractionated crystallization; a small PTT crystallization exotherm appeared at ∼135°C besides the normal ∼175°C exotherm. Above 70 wt% PP, PTT crystallization exotherms disappeared. In contrast, PP in the blends showed crystallization exotherms at 113–121°C for all compositions. When a maleic anhydride‐grafted PP (PP‐g‐MAH) was added as a reactive compatibilizer, the crystallization temperatures (T c ) of PTT and PP shifted significantly to lower temperatures. The shift of PTT's T c was larger than that of the PP, suggesting that addition of the PP‐g‐MAH had a larger effect on PTT's crystallization than on PP due to reaction between male... |
| Databáze: | OpenAIRE |
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