Journal
JOURNAL OF MATERIALS SCIENCE
Volume 49, Issue 3, Pages 1041-1048Publisher
SPRINGER
DOI: 10.1007/s10853-013-7781-z
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [51173171, 11172271, 11172272]
- Major State Basic Research Projects [2012CB025904]
- HASTIT of Henan Province, State Key Laboratory of Materials Processing and Die and Mould Technology
- Key Laboratory of Polymer Processing Engineering, Ministry of Education, China
Ask authors/readers for more resources
In this paper, injection-molded isotactic polypropylene (iPP) microparts and macroparts were respectively fabricated by the molds with different thickness under the same processing conditions. Comparative study on microstructure and mechanical property was carried out by means of scanning electron microscopy (SEM), two-dimensional wide-angle X-ray diffraction (2D-WAXD), two-dimensional small-angle X-ray scattering (2D-SAXS), differential scanning calorimetry (DSC) and tensile test. SEM images reveal that the two parts show distinctly different hierarchical structure. An obvious 'skin-core' structure is present for the macroparts, while a wide distribution of shish-kebab structure develops in both shear and core layer for microparts, exhibiting a specific 'core-free' morphology. 2D-WAXD, 2D-SAXS and DSC results show that microparts have higher orientation degree and crystallinity as compared to macroparts, which are responsible for the remarkably high tensile strength and modulus. Our work provides a good example for better understanding processing structure-property relationship of iPP through tuning their internal microstructure.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available