The spherulitic structure of isotactic polypropylene (iPP) from the melt was studied by polarized light and scanning electron microscopy. From the crystallization morphology, it can be observed that crystallization of iPP from the melt below 132ΠC forms two types of spherulites, termed aand b-spheru
AC breakdown of melt-crystallized isotactic polypropylene
β Scribed by B. Krishnakumar; R. K. Gupta; E. O. Forster; J. R. Laghari
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 685 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0021-8995
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Isotactic polypropylene (iPP) isothermally crystallized from the melt was studied by differential scanning calorimetry (DSC) and light transmission measurements techniques. When samples crystallized isothermally above 132ΠC, a-spherulites were formed only; the DSC measurements showed double melting
## Abstract The measurement of crystallization and melting behaviors under constant rates of cooling and heating and the Avrami's analysis of isothermal crystallization were carried out for various metalloceneβ (METβPP) and Zieglerβ Nattaβcatalyzed (ZNβPP) random polypropylene copolymers with vario