Die geometry induced heterogeneous morphology of polypropylene inside the die during die-drawing process

Autor:	Dong Lyu, Yingying Sun, Yuqing Lai, Ying Lu, P. Caton-Rose, Glen Thompson, Yongfeng Men, Phil Coates
Rok vydání:	2019
Předmět:	Polypropylene Diffraction Materials science Polymers and Plastics Organic Chemistry Geometry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry 0210 nano-technology
Zdroj:	Polymer Testing. 74:104-112
ISSN:	0142-9418
DOI:	10.1016/j.polymertesting.2018.12.019
Popis:	The morphology distribution of isotactic-polypropylene (iPP) shaped through a die during hot stretching process was investigated via wide-angle X-ray diffraction technique. The evolution of micro-structures in the outer layer (layer closer to the die wall) and the inner layer (layer in the center of die) of die-drawn iPP were both recorded. It turned out that the difference of morphology distribution between outer and inner layers changes with the distance from the die entrance to exit. In general, a larger difference between outer and inner layers could be found at the intermediate deformation region inside the die while such difference disappeared at both of the entrance and exit regions of die. These behaviors could be interpreted as a result of the existence of a heterogeneous distribution of force field inside the die, which was caused by the die geometry and inclination of the drawing force. This work showed that the heterogeneous force field inside the die could be revealed through analyzing the morphology of a die-drawn sample.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d469cb8865a749c9908c88f796030889 https://doi.org/10.1016/j.polymertesting.2018.12.019 Zobrazit plný text záznamu Full Text from ScienceDirect