Thermosetting plastics

Thermoplastics suffer from creep, a relaxation of the material from long term loading. Several thermoplastic materials, particularly composites, tend to fracture instead of deform beneath high stress levels. Examples and uses: • ABS is a lightweight plastic, used in musical instruments, whitewater canoes, Lego bricks and construction

Product Evaluation: A Hairdryer Introduction. I am a 4th year student in St Patrick's Grammar school Downpatrick studying technology and design for my GCSE. I must do two focused tasks, my first task is a product evaluation, for this task I will be evaluating a hairdryer manufactured by Vidal Sassoon. Justification. I picked this appliance because: Ÿ It is a commonly used household object. Ÿ I have this appliance in my house so I can look at it whilst

The Impact of New Materials on Product Deisng in 20th and 21st Centuries As new materials are developed and processed, design technologists and people working with industrial materials must think how these new materials will affect the way in which they design and manufacture products. Design technologists also have to be conscious of how these materials effect the environment and the way in which they are

Plastics and their Environmental Impact – Issues Investigation 1. Describe what plastics are. Plastics are materials that can be moulded into any shape by applying heat and/or pressure while soft but obtain a hard a rigid structure when hardened. Plastics are mainly carbon based and can be made out of materials such as crude oil, plants, minerals, natural gas and coal. Plastics are made up of large molecules called polymers which are made up of shorter compounds called monomers. To make various

Bakelite's molding process had a number of advantages. Bakelite resin could be provided either as powder or as preformed partially cured slugs thus increasing the speed of the casting. Thermosetting resinsof Bakelite though require heat and pressure during the molding cycle, but without being cooled it could be removed from the molding process, hence the molding process becomes faster [36]. Because of the smooth polished surface that is obtained, Bakelite objects required less finishing. Bakelite

over one trillion plastic bags are used every year worldwide. Plastic is not biodegradable so for each bag it takes one thousand years to degrade or totally break down. Since plastic was first produced in 1907, humans have generated 8.3 billion metric tons plastic products, that is equivalent to 25,000 empire state buildings or 80 billion blue whales. Plastics have outlasted most man-made materials and have been under environmental scrutiny for quite some time. Although plastic was once regarded

fossil fuels. Most of the plastics that we use are derived from fossil fuels and thus more attention is being drawn into recycling of plastics. The aim of this report is to Introduction Plastics have invariably grown in terms of production and the function they play in our everyday lives. They are also replacing many applications where metals were used due to the fact that it has a much lower density and thus offers weight saving advantages. Simple everyday uses of plastic have also created more

cutlery, CD and DVD cases, plastic models, smoke detector housings, packaging materials, insulation, and foam cups. • Cellulose acetate is used in photography, in adhesives, for eyeglasses frames, and also as a synthetic fiber. Cigarette filters and playing cards are also made of it. • Teflon is mostly known as the non-stick coating of cookware. It is also used as a lubricant to reduce friction and wear, as well as energy consumption in machinery. • Nylon is a silk plastic, used to make fabrics, carpets

Discussion Three polymers with industrial applications were produced. Ethylene glycol and glycerol both produced polyesters with thermoplastic properties. These plastics are soft and malleable when heated, but solidify once removed from heat. Thermosetting plastics were obtained from a reaction with phthalic anhydride rather than with a carboxylic acid because it is more reactive. The reaction between phthalic anhydride and ethylene glycol produced the linear polyester. Correspondingly, the reaction

The thousands upon thousands of amorphous thermoplastics in existence provide many options as to what properties a printed object can have. Both ABS and PLA are commonly used plastic 3-D filament, but they are used for very different reasons. ABS has a higher melting temperature and printing temperature than PLA probably due to the extra entanglement cause by the branching chains in ABS. Without a properly heated printing bed, this could cause warping and shrinkage of the ABS object when lower layers