INFLUENCE OF THE BETA-NUCLEATOR ON THE THERMAL AND SAGGING BEHAVIOURS OF POLYPROPYLENE

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MOHAMMADIAN GEZAZ S.; GHASEMI ESMAEIL; AZIZI HAMED; KARABI M.

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Journal Paper

Paper Information

Journal: Iranian Polymer Journal Year:2006 | Volume:15 | Issue:8 (74) Page(s): 637-644

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Title

INFLUENCE OF THE BETA-NUCLEATOR ON THE THERMAL AND SAGGING BEHAVIOURS OF POLYPROPYLENE

Author(s)

MOHAMMADIAN GEZAZ S. | GHASEMI ESMAEIL | AZIZI HAMED | KARABI M. | Issue Writer Certificate

Keywords

POLYPROPYLENE

THERMOFORMABILITY

CRYSTALLIZATION

MELTING

SAGGING

Abstract

According to the CRYSTALLIZATION conditions, POLYPROPYLENE (PP) can be crystallized into three forms: a-monoclinic, b-hexagonal, and g-form. The major problem with thermoforming of PP is its narrow processing window. Due to broadening the MELTING region, b -crystal form has a significant effect on the THERMOFORMABILITY of PP. In this study g- quinacridone (Q-dye) was used as a b-nucleator agent. Three different concentrations of Q- dye (5, 10, and 50 ppm) were mixed separately with PP by a laboratory twin screw extruder. X-ray graphs confirmed the β-nucleating effect of Q-dye obviously. Differential scanning calorimetry (DSC) was used for evaluating of the CRYSTALLIZATION behaviour. Both MELTING points of a- and b- crystals were seen in the samples containing Q-dye. CRYSTALLIZATION temperature and the rate and degree of crystallinity increase with b-nucleator concentration. SAGGING tests were carried out at 170°C and it was observed that sag distance and SAGGING rate decreased with increasing Q-dye content.

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APA: Copy

MOHAMMADIAN GEZAZ, S., GHASEMI, ESMAEIL, AZIZI, HAMED, & KARABI, M.. (2006). INFLUENCE OF THE BETA-NUCLEATOR ON THE THERMAL AND SAGGING BEHAVIOURS OF POLYPROPYLENE. IRANIAN POLYMER JOURNAL (ENGLISH), 15(8 (74)), 637-644. SID. https://sid.ir/paper/537699/en

Vancouver: Copy

MOHAMMADIAN GEZAZ S., GHASEMI ESMAEIL, AZIZI HAMED, KARABI M.. INFLUENCE OF THE BETA-NUCLEATOR ON THE THERMAL AND SAGGING BEHAVIOURS OF POLYPROPYLENE. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2006;15(8 (74)):637-644. Available from: https://sid.ir/paper/537699/en

IEEE: Copy

S. MOHAMMADIAN GEZAZ, ESMAEIL GHASEMI, HAMED AZIZI, and M. KARABI, “INFLUENCE OF THE BETA-NUCLEATOR ON THE THERMAL AND SAGGING BEHAVIOURS OF POLYPROPYLENE,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 15, no. 8 (74), pp. 637–644, 2006, [Online]. Available: https://sid.ir/paper/537699/en

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