Effect of β-phase nucleating additives on structure and properties of blow extruded polypropylene

✍ Scribed by S. Radhakrishnan; M. Tapale; N. Shah; E. Rairkar; V. Shirodkar; H. P. Natu

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 280 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970516)64:7<1247::aid-app1>3.0.co;2-j

✦ Synopsis

The structure development and mechanical properties of blow extruded polypropylene containing b-phase nucleating additives was studied. Quinacridone red and cadmium red were both found to nucleate the b phase in polypropylene, the former being a much more efficient nucleator than the latter. The b-phase spherulites formed in the presence of these nucleating agents were small and extensively volume filled, yielding high crystallinity. The modulus increased 2-3 times, elongation at break decreased, and there was a sharp break point without much yield when the b-phase nucleating agents were added as compared to the pure a-phase polypropylene.