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题名:
Formation of various crystalline structures in a polypropylene/polycarbonate in situ microfibrillar blend during the melt second flow
作者: Xia, XC; Yang, W; He, S; Xie, DD; Zhang, RY; Tian, F; Yang, MB
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
出版日期: 2016
卷号: 18, 期号:20, 页码:14030—14039
关键词: FIBER-REINFORCED POLYPROPYLENE ; HIGH-DENSITY POLYETHYLENE ; X-RAY-SCATTERING ; ISOTACTIC-POLYPROPYLENE ; MECHANICAL-PROPERTIES ; SHEAR-FLOW ; CARBON NANOTUBES ; BETA-CRYSTALS ; MORPHOLOGY ; COMPOSITES
DOI: 10.1039/c6cp01426g
通讯作者: Yang, MB (reprint author), Sichuan Univ, Coll Polymer Sci & Engn, Chengdu 610065, Sichuan, Peoples R China. ; Yang, MB (reprint author), Sichuan Univ, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China. ; Tian, F (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 2012204, Peoples R China.
文章类型: 期刊文献
英文摘要: A strong shear flow was imposed on the melt of polycarbonate (PC) microfibrils with beta-nucleation agent reinforced isotactic polypropylene (iPP) during the melt second flow process, i.e. gas-assisted injection molding (GAIM). A special shell-core structure was formed in the iPP/PC microfibrils with b-nucleation agent (PP/PC/beta-NA) composites. A lot of beta-transcrystalline and alpha-transcrystalline superstructures were observed in the skin and sub-skin regions, whereas beta-spherulite structures were formed in the gas channel region. There is no doubt that the distinct hierarchical structure has great potential to significantly improve the mechanical performance of the composites, and the experimental results verify this. The results of the mechanical performance testing show that the yield strength of the PP/PC/beta-NA composites reached 61.9 MPa, which is 19.7 MPa higher than that of the iPP parts molded by GAIM (G-iPP) (42.2 MPa). The tensile modulus of the PP/PC/beta-NA composites (3.3 GPa) increased by 135%, compared to that of G-iPP (1.4 GPa). The high content of beta-crystals improved the elongation at break of the composites compared to the iPP/PC microfibril (PP/PC) composites; the elongation at break of the PP/PC/beta-NA composites (13%) is over 3 times greater than that of the PP/PC composites (4%).
收录类别: SCI
语种: 英语
WOS记录号: WOS:000377042400033
ISSN号: 1463-9076
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/25730
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Xia, XC,Yang, W,He, S,et al. Formation of various crystalline structures in a polypropylene/polycarbonate in situ microfibrillar blend during the melt second flow[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016-01-01,18(20):14030—14039.
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