چهارشنبه 19 اردیبهشت 1403
| عنوان مقاله | |
| عنوان مقاله |
Modification of iPP microcellular foaming behavior by thermal history control and nucleating agent at compressed CO2 |
| عنوان فارسی مقاله | تعدیل رفتار فوم میکروسلولی iPP توسط کنترل تاریخچه حرارتی و عامل هسته ای در CO2 متراکم |
| مشخصات مقاله انگلیسی | |
| نشریه: Elsevier |
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| سال انتشار |
2018 |
| عنوان مجله |
The Journal of Supercritical Fluids |
| تعداد صفحات مقاله انگلیسی | 10 |
| رفرنس | دارد |
| تعداد رفرنس | 53 |
| چکیده مقاله | |
| چکیده |
This study is aimed at using thermal history control and nucleating agent to adjust the foaming behavior of isotactic polypropylene (iPP). Through the introduction of an annealing stage and α nucleating agent, the crystallization and rheological properties of iPP were changed, and its microcellular foaming behavior was tuned correspondingly. Rheological testing results verified the enhancement of melt strength through the presentation of the crystallization stage and α nucleating agent. After an annealing at 110 °C, 10 MPa, for 40 min, iPP was further saturated at 165 °C, 12 MPa for 30 min and then foamed, the cell density is 7.95 × 109 cells/cm3, while the average cell size is 11.66 μm. Furthermore, the synergy between the annealing treatment and an addition of 0.2 wt.% α nucleating agent could positively affect the heterogenous cell nucleating ability and melt strength of iPP, much smaller sized cells with relatively quite high cell density up to 1013–1014 cells/cm3 were induced. |
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| دانلود | |
