| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 91 === Polyurethane (PU) has been applied widely since the 19th century for its low cost and easy allocation to fabrics of either soft or tough elastomers, or high hardness and abrasion-resistant rigid materials. However, there were no relevant reports until the present time about the electromagnetic wave shielding and electrostatic protection effects for such materials. Therefore, the blend for the PU with UV cut, electromagnetic wave shielding and electrostatic protection have been investigated in this thesis.
This thesis researched the manufacture of polyurethane products with UV-cut, electromagnetic shielding and anti-electrostatic effects by polymer blend methods. Wetting conductive powder with the dispersing agent and then blending polyurethane with a mixer allowed the conductive powder in polyurethane to distribute evenly. Thereby, the conventional polyurethane products can obtain the better UV-cut, electromagnetic shielding effectiveness and conductive properties.
Experimental results indicated that superior UV-cut, electromagnetic wave shielding and electrostatic resistance properties of the polyurethane can not decay by the time. Increasing the quantity of the conductive powder and polyurethane film thickness, the ultraviolet attenuation, maximum electrostatic discharge voltage attenuation, and electromagnetic shielding effectiveness will increase. Comparing all kinds of conductive power, carbon black E-600JD powder has the best effect. Because carbon black’s grain size is smallest, in polyurethane it distributes evenly, causing the distance of the electronic jump to be decreased
|
|---|
