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Manufacture and Performance of Uhmwpe Cryogenic Container

Author: WuJinXi
Tutor: WangQingZhao
School: Shandong University of Science and Technology
Course: Chemical processes
Keywords: Ultrahigh molecular weight polyethylene Cryogenic vessels Preparation Performance
CLC: TQ320.725
Type: Master's thesis
Year: 2009
Downloads: 65
Quote: 0
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Abstract


This paper presents a new method for ultra-high molecular weight polyethylene (UHMWPE) for the preparation of cryogenic vessels. Molding equipment to design, manufacture, molding method successfully prepared by a small ultra-high molecular weight polyethylene cryogenic vessels, studied at low temperatures (liquid nitrogen) the performance of ultra-high molecular weight polyethylene cryogenic vessels, mainly mechanical properties, aging properties and vacuum performance. Based on the basic properties of ultra-high molecular weight polyethylene and processing performance as well as subject requirements, design, full vacuum ultra-high molecular weight polyethylene cryogenic vessels, and container of the performance checking, to meet the index requirements of cryogenic vessels . According to the structure of the full vacuum ultra-high molecular weight polyethylene cryogenic vessel is divided into the inner cylinder, the outer cylinder and the inner cover, outer cover 4 parts, using a molding method, respectively, to design, manufacture of the various parts of the molding die and molding equipment. Molding equipment to design, manufacture of ultra-high molecular weight polyethylene cryogenic container molding process, the successful preparation of ultra-high molecular weight polyethylene cryogenic vessels. Made of the tensile test specimen and the impact test specimen, and then according to the national standards, respectively, in the standard temperature and low temperature conditions for the detection of the mechanical properties and aging properties experiments. Detection of aging properties, the main impact resistance and tensile properties of the test specimens was measured under different conditions, the yield strength and impact strength. Finally, contrast under low temperature conditions and under standard conditions, the performance difference. Main ultra-high molecular weight polyethylene cryogenic vessels, design, assembly of the vacuum system, vacuum performance of ultra-high molecular weight polyethylene cryogenic vessels to detect and the rate of evaporation of liquid nitrogen at checking test. Experimental results show that: (1) ultra-high molecular weight polyethylene has a good low-temperature mechanical properties and meet the various mechanical properties for use as a cryogenic vessel requirements. (2) full-vacuum low-temperature ultra-high molecular weight polyethylene container structure designed to meet the performance requirements of cryogenic vessels. (3) using molded Preparation of high molecular weight polyethylene cryogenic vessel is feasible, but the method is reasonable. (4) independent design of the molding equipment using a laboratory preparation of ultrahigh molecular weight polyethylene cryogenic vessel having a good vacuum performance. UHMWPE alternative the metal preparation cryogenic container is feasible, there are broad application prospects.

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > General issues > Products and testing > Various shapes of products > Container
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