Details

Autor(en) / Beteiligte

• Zhou, Man
• Li, Xin-peng
• Jin, Ming
• Xia, Chao
• Shen, Kai-zhi
• Zhang, Jie

Titel

Simultaneously Improving the Tensile and Impact Properties of Isotactic Polypropylene with the Cooperation of co-PP and β-nucleating Agent through Pressure Vibration Injection Molding

Ist Teil von

• Chinese journal of polymer science, 2016-08, Vol.34 (8), p.1001-1013

Ort / Verlag

Beijing: Chinese Chemical Society and Institute of Chemistry, CAS

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this article, crystalline morphology and molecular orientation of isotactic polypropylene （iPP）, random copolymerized polypropylene （co-PP） and ,β-nucleating agent （β-NA） composites prepared by pressure vibration injection molding （PVIM） have been investigated via polarized light microscopy, scanning electron microscopy, wide-angle X-ray diffraction and differential scanning calorimetry. Results demonstrated that the interaction between co-PP and iPP molecular chains was beneficial for the mechanical improvement and the introduction of β-NA further improved the toughness of iPP. In addition, after applying the pressure vibration injection molding （PVIM） technology, the shear layer thickness increased remarkably and the tensile strength improved consequently. Thus, the strength and toughness of iPP/co-PP/β-NA composites prepared by PVIM were simultaneously improved compared to those of the pure iPP prepared by conventional injection molding （CIM）： the impact toughness was increased by five times and tensile strength was increased by 9 MPa. This work provided a new method to further enhance the properties of iPP/co-PP composites through dynamic processing strategy.