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Oct 1, 2020 · As stated by ASTM, “ultrahigh molecular weight polyethylene can be defined as linear polyethylene with viscosity average molecular weight (Mv) larger than 3 million g/mol” [20], [21]. The PE chains are several orders of magnitude longer than those of simple HDPE, typically, 100,000 to 250,000 monomer units per chain as compared 700 to 1800 ...
- Ziegler-Natta Catalysts for Olefin Polymerizations
This article reviews the recent developments of...
- Solubility of Ethylene in Toluene, Norbornene, and Toluene + Norbornene Mixture
The norbornene/toluene solutions were prepared with the...
- Some Selected Situations
2.. IntroductionModeling the solubility of gaseous olefins...
- A Brief Review
1. Introduction. Ultra high molecular weight polyethylene...
- Study of The Effect of The Nature of Catalyst Systems on The Molecular Structure and Properties of Ultra-High Molecular Weight Polyethylene
It is shown that by careful selection of catalyst...
- The Microstructure of Propylene Homo- and Copolymers Obtained With a Cp2zrcl2 and Methylaluminoxane Catalyst System
The microstructure of propylene homopolymer and...
- Ziegler-Natta Catalysts for Olefin Polymerizations
Feb 4, 2020 · Ultra-High Molecular Weight Polyethylene (UHMWPE) is used in biomedical applications due to its high wear-resistance, ductility, and biocompatibility. A great deal of research in recent decades has focused on further improving its mechanical and tribological performances in order to provide durable implants in patients. Several methods, including irradiation, surface modifications, and ...
- Muzamil Hussain, Rizwan Ali Naqvi, Naseem Abbas, Shahzad Masood Khan, Saad Nawaz, Arif Hussain, Nida...
- 2020
Sep 1, 2020 · Three grades of polyethylene, with weight-average relative molar masses, M ‾ W ${\\bar{M}}_{\\text{W}}$ , of approximately 0.6 × 10 6 , 5 × 10 6 , and 9 × 10 6 , were supplied as compression mouldings by a leading manufacturer of ultra-high molecular weight polyethylene (UHMWPE). They were code-named PE06, PE5, and PE9, respectively. Specimens cut from these mouldings were subjected to a ...
Ultrahigh-molecular-weight polyethylene (UHMWPE) in joint replacement. F-W SHEN, in Biomedical Polymers, 2007. 6.1 Introduction. Ultrahigh-molecular-weight polyethylene (UHMWPE) has been the material of choice for the polymeric component in total joint replacements primarily because of its excellent combination of wear resistance, structural strength and biocompatibility and remains the gold ...
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Jul 13, 2017 · 2. UHMWPE. UHMWPE is a particular type of polyethylene (PE), with an exceptionally high molecular mass. The international Standards Organization (ISO 11542) (ISO, 2001) defines UHMWPE as having a molecular weight of at least 1 million g/mol, while the American Society for Testing and Materials (ASTM) specifies that UHMWPE has a molecular weight greater than 3.1 million g/mol [].
- Pierangiola Bracco, Anuj Bellare, Alessandro Bistolfi, Saverio Affatato
- 10.3390/ma10070791
- 2017
- Materials (Basel). 2017 Jul; 10(7): 791.
Ultra-high-molecular-weight polyethylene (UHMWPE) plays an important role in many important fields as engineering plastics. In this contribution, a precipitation polymerization strategy is developed by combination of highly active phosphino-phenolate nickel catalysts with polymer-insoluble solvent (heptane) to access UHMWPE (Mn up to 8.3 × 106 g mol–1) with good product morphology, free ...
May 22, 2023 · Ultra-high molecular weight polyethylene (UHMWPE) has extremely outstanding mechanical properties and wear resistance, but its melt flowability is too poor, resulting in poor processability. In this work, high-density polyethylene (HDPE) was melt-blended with UHMWPE to promote the flowability of UHMWPE melt. We investigated the effects of UHMWPE and HDPE contents on the rheological behavior ...
