نتایج جستجو برای: polyethylene structure

تعداد نتایج: 1594296  

Journal: :Polymer 2022

We report on < 2 μm spatial resolution investigations of structural and morphological uniformity aligned high-performance gel-spun ultrahigh-molecular-weight polyethylene (UHMWPE) fibers (thicknesses ranging from 60 to 300 μm) whose processing includes draw quench. The degree orientation PE crystallites were found increase near the surface fiber filaments (skin-core structure) in all samples wh...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

A. Irajizad A. Masoud R. Ghasemzadeh Y. Vahidshad,

CuAlS2  Chalcopyrite  nanocrystalline  are  synthesized  with  facile method.  The  heat  arrested  solvothermal  method  for  synthesize nanocrystalline  were  investigated.  The  time  duration  of  synthesis, temperature of solution and metal salts to solvent molar ratio can be parameters  that we are  studied. The nanoparticles were  synthesized with CuCl, AlCl3 and  thiourea (SC(NH2)2...

2013
ShiJun Wang ShuDong Zhang YuChi Zhao

STUDY DESIGN This is a retrospective study comparing polyethylene wear between ceramic ball heads and metal ball heads in total hip arthroplasty. BACKGROUND The ceramic-on-polyethylene bearing option has been introduced as an alternative to metal-on-polyethylene to minimize polyethylene wear debris and reduce subsequent osteolysis and aseptic loosening. However, the reported data were debatab...

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