Journal of Chemical Engineering & Process Technology
Open Access
ISSN: 2157-7048
ISSN: 2157-7048
Ismail Al-Raheil
KSA
Research Article
The structure of Isotactic Polypropylene Crystallized from the Melt
Author(s): Sokainah Rawashdeh and Ismail Al-RaheilSokainah Rawashdeh and Ismail Al-Raheil
The melting behavior of isotactic polypropylene was studied in the hot stage mounted on polarizing optical microscope supported by photomonitor. Over a wide range of crystallization temperature there are two main types of spherulites, α and β spherulites for this polymer α spherulites may exist in three forms α1, α2 and mixed of α1 and α2. The α2-form can be obtained at high crystallization temperature above 145°C and α1 can be observed at low crystallization temperatures below 132°C. The mixed α-spherulites can be obtained between 132°C and 145°C. However, the β-phase form small proportion of the total phase not more than 15% and usually exist when the crystallization temperature below 132°C. If the sample crystallized from the melt it show.. View More»
DOI:
10.4172/2157-7048.1000140