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Studies on the Preparation and Properties of X-Ray Shielding Thermoplastic Polyurethane Composites

Author: YuanXiaoLu
Tutor: LiuLi
School: Beijing University of Chemical Technology
Course: Materials Science and Engineering
Keywords: Thermoplastic polyurethane Rare earths X-ray shielding
CLC: TB34
Type: Master's thesis
Year: 2010
Downloads: 150
Quote: 0
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Abstract


The conventional X -ray shielding materials for leaded vulcanized rubber . Lead is toxic , there are X-ray weak absorption area , and the shortcomings of low-energy X-ray scattering and strong , gradually to be the new lead-free materials replaced . RE / thermoplastic polyurethane composite research in this paper (Ln / TPU), to make up for the weak absorption region of the lead has a lower density , can be thermoplastic molding process , or recycling characteristics , a shielding material in the future development of new direction has broad application prospects . This thesis is to determine the basic recipe of shielding materials and the best process conditions . Comparison of two different stearic modified Ln / TPU composite shielding material mechanical properties effect visits stearic Ln / TPU system mechanics enhancement , stearic modified and dosage . In order to further improve Ln / TPU shield the mechanical properties of the composites , explore and contrast masterbatch , dynamic vulcanization , latex coprecipitation method in three different enhancement methods to study the effect of the Ln / TPU composite mechanical enhancements . Finalized latex coprecipitation method for enhanced modified method . Ln / TPU shield composite nature of aging and can be reprocessed . Ln / TPU sheet prepared in a small pilot study , using a hot roller to open mill mixing , followed by a single screw melt extrusion , calendering, into a piece of process routes . Ln / TPU material for the preparation of the production to meet the practical application in the field of medical protective laid the technological foundation .

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