Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 301, Issue 12, Pages 1468-1472Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201600305
Keywords
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Funding
- National Science Foundation of China [11432003, 51173171]
- HASTIT of Henan Province
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The mechanical properties and microstructure of injection molded isotactic polypropylene parts with high orientation before and after annealing are analyzed. The mechanical properties of the annealed samples are improved effectively. Through thorough analysis of various structural characterizations, a microstructural model based on the fact that the total length of long period kept constant to analyze the variation of mechanical properties is proposed. It is suggested that the increase of overall crystallinity, the recombination of crystalline phase, and the increase of amorphous phase, respectively, are beneficial for the improvements of the strength, stiffness, and toughness of annealed samples.
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