PET polyester fibres are produced commonly in round crosssection, but fibres of special cross-section are now available from a number of manufacturers. PET polyester fibres are thermoplastic, and lend themselves well to physical modificationc associated with this property. Crimped and textured yarns of all familiar types are available. Production: Polyethylene terephthalate is made by the condensation of terephthalic acid, or a derivative such as dimethyl terephthalate, with ethylene glycol. Reaction a.
The building itself is constructed with a wide array of structural elements. These include beams, columns and slabs on each level as well as shear walls to take on horizontal loads. As there is very low risk of earthquake in Victoria, these horizontal loads are mostly due to wind. The building also contains bracing to support beams as well beams of varying sizes and cross-sectional shapes to transfer loads over Building
Question 1 Question Topic: A1 – Identification of Materials – Physical Characteristics Question: Given the Monomer Unit structure below answer the following: A: Name the plastic relating to it B: Write the density for both amorphous and crystalline (in g/cm^3) C: List 2 things commonly made with it. D: CALCULATE the molecular weight of polypropylene (g/mol) Answer: The plastic relating to the monomer structure above is Polypropylene. (PP) Polypropylene is one of the lower density fibers. The density for amorphous is 0.855 g/cm^3 and the density for crystalline is 0.946 g/cm^3. Polypropylene usually polymerizes by addition.
(n.d.). Retrieved April 17, 2016, from http://www.slideshare.net/ ripestone_ho/polymers-and-their-properties INTERESTING facts about Isotactic Polypropylene Polypropylene is a versatile thermoplastic polymer. It can be moulded into different shapes and sizes and hence, can be put to many uses (material used to make chairs, containers, tools etc.) It is hard but flexible. (semi-rigid) It is lightweight!
Excess Bagasse is burned for cogeneration or to run a factory or distillery. Bagasse is also used in paper manufacture, depending on other fibers and processing, it can be used for all grades from coarse brown to newspaper and fine paper. Bagasse has also been used for single cell protein production as cellulose source, and as animal
These ranges include microorganisms, suspense materials, colloids and emulsions (Carwright, 1994). Lancrenon et al., (1993) analyzed the application of MF (0.1-10 µm) and UF (2-200 nm) in sugar beet and sugarcane refinements (Hinkova et al., 2005). Membrane
Additionally, wood can warp as a result of moisture being absorbed and released. The uneven absorption of moisture is the primary agent of warping in wood. The warping phenomenon is attributed to other distinct factors. They include: • Wood species • Grain orientation • Sunlight and temperature • Air flow • Uneven finishing on the wood Wood warping can take form in five different ways: • The wood can be bowed: In this state, the wood warps
The ground layer of the coffin consists of two layers, the rough layer which covered the wood directly with thickness approximately 3mm and fine layer used under the pigments directly with thickness approximately 30μm (Fig. 3A). It was dirty white in color and of fairly grainy texture covers the wood on all surfaces. This ground material which presumably mixed with adhesive binder was applied as a very thin wash on all surfaces except the exterior of the top, where it is significantly thicker and contributes to the modeling of the shape. The ground material was also used to build up areas such as the nose and knees.
Pectin is a plant polysaccharide which contains a high proportion of galacturonic acid residues1. Pectin is used by Food industry for its gel-forming abilities in production of jams and jellies, to increase the viscosity of drinks and as stabilizers in acid milk products1. Pectin has also been studied for its anti-cancer properties2. Commercially, pectin is derived from apple pomace and citrus peel. Apart from these, mango wastes3, sugar beet wastes4, sunflower heads5, Roselle calyces6, dragon fruit7, watermelon rind8, cocoa husks9 and papaya wastes10 have been studied for alternate sources of pectin.
They are wool and silk. Minor hair fibres are listed below: • Camel • Alpaca • Mohair • Cashmere • Rabbit and • Qiviut Mineral Asbestos: Asbestos is a natural fibre obtained from varieties of rock. It is a fibrous form of silicate of magnesium and calcium, containing iron, aluminium, and other materials. It is acid proof, rust proof, and flame proof. Consequently it has been used for materials requiring certain of these characteristics.