Dt Gcse Revision: Smart Materials

immaterial naturals A SMART material is a material that is stirred by outside influence. Polymorph * Type of thermo plastic (can be reshaped many times). * Normally supplied in form of granules or small plastic beads. * Low fusing temperature of around 60C. This agent it can be reduced to a mouldable condition by immersion in hot water. * Once fused turns from light-tight to clear. * Heating above 65C is dangerous as it will cause a sticky-adherent mass, similar to hot-melt glue. Polymorph has high molecular weight and great tensile strength, and thus suited for applications where mechanical strength is important. * about uses are Mould- qualification (i. e Gum-shields), general DIY materials, making a polymorph skeleton to support separate materials, trainer/shoe components. QTC (Quantum Tunnelling Composite)* QTC is a complicated material made from conductive filler particles combined with an elastomeric binder, typically silicone rubber. QTC cloth has the unique abil ity to smoothly deepen from an electrical insulator to a metal-like conductor when placed under squelch. * While in an unstressed state the QTC Material is a near-perfect insulator with any form of deformation the material starts to conduct and with sufficient pressure metallic conductivity levels can be achieved. * QTC Material can be create or moulded into virtually any size, thickness or shape. * QTC Material is mechanically strong. QTC Material can be made to last extreme temperatures limits. * Used for switches and keyboards. Thermochromic Ink * These materials variety colour when there is a counterchange in temperature. * Thermochromic ink comes in dickens forms Liquid crystals and Leuco dyes. * Leuco dyes are easier to work with and leave behind for a greater range of applications. * Applications of thermochromic ink include flat thermometers, battery testers, clothing. Mr Tsiang