Crystal form and orientation of isotactic polypropylene samples prepared by vibration-injection molding
β Scribed by Jie Zhang; Tai Zeng; Ji Zhu; Yanwei Lei; Kaizhi Shen; Qiang Fu
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 233 KB
- Volume
- 106
- Category
- Article
- ISSN
- 0021-8995
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## Abstract To better understand the formation of different crystal structures and improve the mechanical properties of highβdensity polyethylene samples, melt vibration technology, which generally includes shear vibration and hydrostatic pressure vibration, was used to prepare injection samples. T
The X-ray crystallinity and the isotactic index [II( % ) ] values were measured for polypropylene (PP) samples prepared by V0Cl3 and various aluminum alkyls. The reaction parameters, such as aging time, temperature, reaction medium, and additives, have some effect on the crystallinity of the samples