Engineering and High Performance Plastics - download pdf or read online

By D.K. Platt

Engineering and excessive functionality polymers disguise a large spectrum of fabrics which are valued, among different issues, for his or her temperature resistance, energy, dimensional balance and chemical resistance in lots of difficult functions. This new marketplace file from Rapra, discusses their key functionality homes, the traits in fabric advancements, and their software in automobile, electric & electronics, commercial, shopper items and different markets, together with clinical

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If a liquid crystal polymer melt is subjected to shear or stretching flow, as in the case of all thermoplastic processing operations, then the rigid macromolecules order themselves into fibres and fibrils, which are frozen when the melt cools. This is how the specific morphology of LCP is formed in the solid state. 12 presents a comparison of the performance properties for unfilled, 30% mineral filled and 30% glass fibre-reinforced grades of liquid crystal polymers. a. a. a. a. a. a. 09 LCPs have excellent dimensional stability and creep resistance, especially at very high temperatures.

Tests have shown cycle times of < 1 second and for a production batch of 1 million components, the lower production costs of LCP far outweighed the lower material costs of for example, PA46. On the downside, LCP requires drying and careful attention to part design. LCP has low weld line strength and low toughness with fracture behaviour resembling that of wood. 2 Applications These properties make them especially suitable for precision electrical and electronic components, connecting parts in fibre optic cables, telecommunications devices, chemical processing machines, medical devices, automotive under-the-bonnet components, aerospace and machinery components.

Solvay Advanced Polymers is the world’s only producer of PPSU under the Radel R trade name. Radel R resin can be injection moulded, vacuum formed or machined. 1 Properties Liquid crystal polymers are wholly aromatic polyester polymers that were first launched in the late 1980s. However the advance in liquid crystal polymers has taken longer than anticipated because of their high cost relative to competing materials such as PPS. A characteristic feature of LCP is the molecular structure. These polymers consist of rigid rod-like macromolecules, which align in the melt to produce liquid crystal structures.

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