Crystalline structure and remarkably enhanced tensile property of β-isotactic polypropylene via overflow microinjection molding

2019 ◽  
Vol 76 ◽  
pp. 448-454 ◽  
Author(s):  
Zhongzhu Liu ◽  
Xianhu Liu ◽  
Lele Li ◽  
Guoqiang Zheng ◽  
Chuntai Liu ◽  
...  
Keyword(s):  
Tensile Property ◽  
Crystalline Structure ◽  
Isotactic Polypropylene ◽  
Microinjection Molding

scholarly journals Direct correlation between modulus and the crystalline structure in isotactic polypropylene

2015 ◽  
Vol 9 (3) ◽  
pp. 308-320 ◽  
Author(s):  
A. Menyhard ◽  
P. Suba ◽  
Zs. Laszlo ◽  
H. M. Fekete ◽  
A. O. Mester ◽  
...  
Keyword(s):  
Crystalline Structure ◽  
Isotactic Polypropylene

Analysis of crystalline structure and morphology of isotactic polypropylene under the coexistence of organic montmorillonite particles and shear flow

Polymer ◽  
2016 ◽  
Vol 82 ◽  
pp. 274-284 ◽  
Author(s):  
Fan Lei ◽  
Huaning Yu ◽  
Shuo Yang ◽  
Huimin Sun ◽  
Jiang Li ◽  
...  
Keyword(s):  
Shear Flow ◽  
Crystalline Structure ◽  
Isotactic Polypropylene ◽  
Structure And Morphology ◽  
Organic Montmorillonite

Effective in situ polyamide 6 microfibrils in isotactic polypropylene under microinjection molding: significant improvement of mechanical performance

2016 ◽  
Vol 51 (23) ◽  
pp. 10386-10399 ◽  
Author(s):  
Liyan Yang ◽  
Juqiao Su ◽  
Qi Yang ◽  
Tongying Zhang ◽  
Zhongguo Zhao ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Mechanical Performance ◽  
Polyamide 6 ◽  
Microinjection Molding

Morphological Characteristics of β-Nucleating Agents Governing the Formation of the Crystalline Structure of Isotactic Polypropylene

2021 ◽  
Author(s):  
Liyuan Liu ◽  
Ying Zhao ◽  
Chunbo Zhang ◽  
Zhiyuan Dong ◽  
Kezhi Wang ◽  
...  
Keyword(s):  
Crystalline Structure ◽  
Isotactic Polypropylene ◽  
Morphological Characteristics ◽  
Nucleating Agents

Crystalline Structure of Injection Molded β-Isotactic Polypropylene: Analysis of the Oriented Shear Zone

2013 ◽  
Vol 52 (34) ◽  
pp. 11996-12002 ◽  
Author(s):  
Xianhu Liu ◽  
Kun Dai ◽  
Xiaoqiong Hao ◽  
Guoqiang Zheng ◽  
Chuntai Liu ◽  
...  
Keyword(s):  
Shear Zone ◽  
Crystalline Structure ◽  
Isotactic Polypropylene ◽  
Injection Molded

scholarly journals Effect of Clay Modification and Preparation Method on Crystalline Structure of Isotactic Polypropylene/Organoclay Nanocomposites

2018 ◽  
Vol 30 (5) ◽  
pp. 1135-1141
Author(s):  
Murefah M. Anazy ◽  
Wafa K. Mekhamer ◽  
Layla A. Al-Juhaiman
Keyword(s):  
Crystalline Structure ◽  
Isotactic Polypropylene ◽  
Preparation Method ◽  
Clay Modification

scholarly journals Crystallization and Microstructure Evolution of Microinjection Molded Isotactic Polypropylene with the Assistance of Poly(Ethylene Terephthalate)

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 219
Author(s):  
Zhongguo Zhao ◽  
Xin Zhang ◽  
Qi Yang ◽  
Taotao Ai ◽  
Shikui Jia ◽  
...  
Keyword(s):  
Isotactic Polypropylene ◽  
Ethylene Terephthalate ◽  
Polarized Light ◽  
Hybrid Structure ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Microinjection Molding ◽  
Poly Ethylene Terephthalate ◽  
The Difference ◽  
Poly Ethylene

In this work, a series of isotactic polypropylene/poly(ethylene terephthalate) (iPP/PET) samples were prepared by microinjection molding (μIM) and mini-injection molding (IM). The properties of the samples were investigated in detail by differential scanning calorimetry (DSC), Wide-Angle X-ray Diffraction (WAXD), Polarized light microscope (PLM) and scanning electron microscopy (SEM). Results showed that the difference in thermomechanical history between both processing methods leads to the formation of different microstructures in corresponding iPP/PET moldings. For example, the dispersed spherical PET phase deforms and emerges into continuous in-situ microfibrils due to the intensive shearing flow field and temperature field in μIM. Additionally, the incorporation of PET facilitates both the laminar branching and the reservation of oriented molecular chains, thereby leading to forming a typical hybrid structure (i.e., fan-shaped β-crystals and transcrystalline). Furthermore, more compact and higher degrees of oriented structure can be obtained via increasing the content of PET. Such hybrid structure leads to a remarkable enhancement of mechanical property in terms of μIM samples.

Energy Calculations for Isotactic Polypropylene:  A Contribution To Clarify the β Crystalline Structure

1998 ◽  
Vol 31 (20) ◽  
pp. 6926-6934 ◽  
Author(s):  
Dino R. Ferro ◽  
Stefano V. Meille ◽  
Sergio Brückner
Keyword(s):  
Crystalline Structure ◽  
Isotactic Polypropylene ◽  
Energy Calculations
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