title: Polypropylene injection molded part with novel macroscopic bamboo-like bionic structure.
abstract: A macroscopic bamboo-like bionic structure was fabricated in the injection-molded bar of isotactic polypropylene via the combined effect of "melt manipulation" and beta-nucleator. Such structure consists of strengthened shell zone with high orientation and low beta-phase amount, and toughened core part with isotropic texture and dominant beta-modification. The influences of shear intensity on structural hierarchies, polymorphism, and crystalline morphology were estimated. Both toughness and strength can be significantly improved with increasing shear intensity on the bamboo-like structure. Our study suggested an alternative approach to achieve excellent comprehensive mechanics in polypropylene via macroscopic structural design during the practical molding process.
authors.affiliation: Department of Polymer Science and Materials, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, PR China.
authors.forename: Run
authors.initials: R
authors.lastname: Su
authors.forename: Zeqi
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xiang
authors.initials: X
authors.lastname: Gao
authors.forename: Yao
authors.initials: Y
authors.lastname: Ge
authors.forename: Ke
authors.initials: K
authors.lastname: Wang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D007267:Injections; D055595:Mechanical Phenomena; D008855:Microscopy, Electron, Scanning; D011126:Polypropylenes / Q000737:chemistry*; D013329:Structure-Activity Relationship; D013718:Tensile Strength; D014961:X-Ray Diffraction
chemical_list: D011126:Polypropylenes