Category Archives: GREEN BIORENEWABLE. BIOCOMPOSITES

DIFFERENTIAL SCANNING CALORIMETRY (DSC)

DSC is widely used to characterize the thermal properties of WPCs. DSC can mea­sure important thermoplastic properties, including the melting temperature (Tm), heat of melting, degree of crystallinity x(%), crystallization, and presence of recy- clates, nucleating agents, plasticizers, and polymer blends (the presence, composi­tion, and compatibility). Thermal analysis of the WPC samples was carried out on a differential scanning calorimeter […]

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POL YMERIZA TION

Ethylene is a rather stable molecule that polymerizes only upon contact with cata­lysts. The conversion is highly exothermic, that is the process releases a lot of heat. Coordination polymerization is the most pervasive technology, which means that metal chlorides or metal oxides are used. The most common catalysts consist of titanium(III) chloride, the so-called Ziegler-Natta catalysts. Ethylene can be pro­duced […]

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STARCH POLYMERS

Starch is one of the most exciting and promising raw materials for the production of biodegradable products. It is the major polysaccharide reserve material of photosyn­thetic tissues and of many types of plant storage organs such as seeds and swollen stems. The primary crops used for its production consist of potatoes, corn, wheat and rice. In all of these sources, […]

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OTHER FIBROUS MATERIALS PRODUCED ON AN INDUSTRIAL SCALE

DuPont® was one of the first companies to attempt to produce silk fibroins on an industrial scale70, but perfecting the large-scale production of spider silks has proved arduous and challenging relative to some other materials. DuPont® manufactures ap­proximately 2 million tons of Kevlar each year, requiring 15,800,000 to 18,750,000 pounds of sulfuric acid.71 The process also requires petroleum products, substantial […]

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DENSITY

The density of biocomposite plays a significant role in weight reduction. For en­ergy savings, designer are striving to manufacture light weight and high strength components. However it is to be noted that the density of the biocomposite have a significant influence on their noise reduction capabilities. Jute fibers are heavier than water and have a density in the range of […]

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WATER ABSORPTION, THICKNESS CHANGES AND SPECTROPHOTOMETRIC RESPONSES

Water absorption is due to the hydrogen bonding of water molecules to the hydroxyl groups on the cells walls of the wood or lignocellulosic fibers.4870 The long-term water absorption as a function of time for the various LPCs at room temperature is shown in Fig. 13.5. All composites tested absorbed water during the incubation peri­od and no distinct saturation levels […]

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