Page 1 of 6 - About 52 Essays
  • The Aerospace Industry

    The polymer matrix is formed during the curing cycle in which temporary or chemical bonding occurs between polymer chains. Thermoset polymers possess permanent crosslinking whereas thermoplastics undergo temporary intermolecular crosslinking. The intermolecular crosslinks are weak and lead to the entanglement of the polymer chains with dipole-dipole and London dispersion interactions between polymer segments. Thermoset and thermoplastic polymers have advantages and disadvantages to their use, but aeronautical composites are characteristically thermosetting polymer matrices. Possible thermosetting polymers include bismaleimides (BMI),13 benzoxazines,14 but epoxies15 are most commonly…

    Words: 1289 - Pages: 6
  • Hydraulic Fracking

    Plastics (Phenolic resins, Epoxy resins, Polyesters and Polyurethanes) are materials which make up the objects which we use in our everyday lives such as phones, cars, cooking utensils, computers and shoes, ( Plastics are a group of material which can either be synthetic or naturally occurring. Plastics are considered as polymers a substance which has a molecular structure with a large number of units bonded together, ( Most plastics are…

    Words: 923 - Pages: 4
  • Effects Of DINP

    Thermoplastic starch is a biodegradable polymer mixture which is biologically degradable and has also a great mechanical and thermal properties. Thermoplastic starch is made by blending starch with a plasticizing agent such as sorbitol or glycerol to make thermoplastic melt. This is why thermoplastic is non harmful to humans, it contains non toxic materials which are easily compostable and biodegradable. On the other hand, DINP is toxic and not compostable or degradable. Jelu-Werk is a toy…

    Words: 625 - Pages: 3
  • The Chemistry Behind Polymers

    To enumerate, the alteration of polymerization can result in the potential development of two distinct types of plastics, thermoplastics and thermosets. Thermoplastics can be remelted and shaped, but on the other hand thermosets cannot (“The Basics”). These differences are due to the dissimilarity between the way that the chains within the polymer are formed. Correspondingly, the two different types of plastics, as a whole, are made in completely different ways in order to produce the desired…

    Words: 1344 - Pages: 6
  • Veejay Plastic Case Study

    project. Types of Injection Moldable Plastic Materials that We Work With Some of the popular types of injection molding plastic materials we work with include the following. • PEEK (Polyether ether Ketone): This is a transparent thermoplastic polymer used mainly in engineering…

    Words: 1034 - Pages: 5
  • Dimethyl Siloxane Case Study

    Mowrer, N. R. (2003) has mentioned that Solvent-borne thermoplastic acrylic resins tend to have better chemical resistance than alkyds and can be cold blended with silicone resins to give weather-resistant paints for exterior applications. Addition of as little as 10% silicone can significantly increase the gloss retention and chalking resistance. The improvement that can be achieved in gloss retention of various organic coating resins through silicone modification. Another research involves the…

    Words: 920 - Pages: 4
  • Theoretical Factors: Three Basic Types Of Pololyethylene

    cycle (related to trying different materials and product redesigns. Material selction id based on many considerations like mechanical properties, thermal properties,processing properties. 2.3. Polymer Electrolyte Membrane(PEM) Fuel Cell Polymer electrolyte membrane fuel cells have the ability to operate at very low temperatures. Since they have the ability to deliver such high power densities at this temperature they can be made smaller which reduces overall weight, cost to produce and…

    Words: 856 - Pages: 4
  • Tpo Roofing Research Paper

    How TPO Roofing Works TPO Roofing Thermoplastic Olefin (TPO) roofing membrane is often regarded as one of the most efficient and economical roofing alternative to PVC roofing. This single ply roofing system is made out of thermoplastic polyolefin membrane, which consist thermoplastic polyolefin top fly compound, TPO polymer base and polyester-reinforced fabric center. TPO fabric also uses fillers made out of carbon fiber, Metal Oxy Sulfate, wollastonite and fiberglass as well as EPDM and…

    Words: 1230 - Pages: 5
  • Definition Of Polylefins In Food Packaging

    When learning about polyolefins, there are three questions that must be answered. First is, what is a polyolefin? “A polyolefin is an odorless, non-polar, and non-porous material that can be used in structural plastics, consumer goods, industrial products, and food packaging. Polyolefin stands for "oil like" and is commonly referred to as a thermoplastic or polyalkene because it has a waxy texture.” (What is a Polyolefin? n.d.) The second question to ask is, how is a polyolefin made?…

    Words: 1917 - Pages: 8
  • What Are Marketing Principles Used In The Creation Of Dairy Packaging Case Study

    Understanding recyclable materials and eco-labels in packaging process 3.1.1. What packaging materials can be recycled? In general, most of packaging materials such as glass, metal, thermoplastic, paper and cardboards are suitable for recycling, but in many cases, not all of the materials can be recycled (Marsh & Bugusu, 2007, n.p.g.). For example, some materials, especially plastic food containers, are contaminated with oil and grease, which make them unsuitable or hard for recycling (“Identify…

    Words: 1078 - Pages: 5
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