Study on Structural Deformation and Performance of Polypropylene Spherulite Prepared by Uniaxial Compression Processing

Abstract:

Mechanical properties have close relation with microstructure. Based on orientation of the molecule chain in fiber, they show a rapid increase in tensile properties. Nevertheless, block materials mainly gain rise of mechanical properties by blend or composite, it is hardly proposed on the self-reinforced materials by optimizing the microstructure. In this paper, a strengthening of PP was gained by uniaxial compression through small deformation of spherulite. A series of measurements were applied, including tensile test, polarizing optical microscope (POM) and differential scanning calorimeter (DSC). The results show that the tensile properties of polypropylene (PP) have a rapid rise. POM suggestes that the spherulite has deformed into ellipsoid even belt along the orientation of sample of PP, which plays an important role in self-reinforcing of PP. And the initial melt point displayed by DSC slightly decreases because of the partial ruptures of crystal phase.

• Periodical: Advanced Materials Research (Volumes 175-176)
• Pages: 308-311
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.175-176.308
• Online since: January 2011
• Authors: Ming Li Jiao, Kai Yang, Wang Xi Zhang, Wei Pan
• Keywords: Compression, Deformation of Spherulite, Polypropylene (PP), Uniaxial Orientation

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