Formation of various crystalline structures in a polypropylene/polycarbonate in situ microfibrillar blend during the melt second flow
Xia, XC; Yang, W; He, S; Xie, DD; Zhang, RY; Tian, F; Yang, MB; 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.
2016
发表期刊PHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
卷号18期号:20页码:14030—14039
文章类型期刊文献
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%).
关键词Fiber-reinforced Polypropylene High-density Polyethylene X-ray-scattering Isotactic-polypropylene Mechanical-properties Shear-flow Carbon Nanotubes Beta-crystals Morphology Composites
DOI10.1039/c6cp01426g
收录类别SCI
语种英语
WOS记录号WOS:000377042400033
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/25730
专题中科院上海应用物理研究所2011-2018年
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.
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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,2016,18(20):14030—14039.
APA Xia, XC.,Yang, W.,He, S.,Xie, DD.,Zhang, RY.,...&Tian, F .(2016).Formation of various crystalline structures in a polypropylene/polycarbonate in situ microfibrillar blend during the melt second flow.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(20),14030—14039.
MLA Xia, XC,et al."Formation of various crystalline structures in a polypropylene/polycarbonate in situ microfibrillar blend during the melt second flow".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.20(2016):14030—14039.
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