| Autor: |
R. H. Zhang, D. Shi, S. C. Tjong, R. K. Y. Li |
| Předmět: |
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| Zdroj: |
Journal of Polymer Science. Part B, Polymer Physics; Oct2007, Vol. 45 Issue 19, p2674-2681, 8p |
| Abstrakt: |
By using a commercial β‐nucleating agent (TMB‐5) for polypropylene (PP), it was observed that high β‐crystal content in a compatibilized blend of polypropylene/polyamide‐6 (labeled as Blend‐03 in this work) can be achieved for samples prepared by compression moulding. As β‐PP possesses more superior impact strength then α‐PP, and the β to α transformation is an important mechanism of energy absorption for β‐PP, it is of obvious interest to understand the possibilities of β to α transformation in β‐polypropylene/polyamide‐6 blends. Tensile tests were performed at temperatures of 20, 30, 40, and 50 °C, and the occurrence of β to α transformation was monitored by differential scanning calorimeter and wide angle X‐ray diffraction measurements. It was observed that the β to α transformation in Blend‐03 could only be activated at elevated tensile testing temperatures. This was related to the increase in tensile elongation at break with the increase in tensile testing temperature. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2674–2681, 2007 [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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