Polymers

As a leading industrial seals distributor, Valley Seal provides Parker and Coorstek engineered sealing products. We at Valley Seal ensure a stock of the widest range of seals for customers to choose from. These include simple O-rings, rods wipers and scrapers, back-up rings, and custom molded rubber products. We also provide uniquely designed seals and fasteners from Parker. These sealing products will be discussed in this post. Three Uniquely Designed Parker Seals The seals and fastener…

Organic/Natural cosmetic products are not superior to chemical cosmetic products because chemical products can do things organic/natural cosmetic products cannot. Hairdresser Daniel Galvin said, “There is just no way to perm hair without chemicals…”(dailymail.co.uk). In order to perm hair, the hair cuticle must be penetrated and changed. The use of chemicals is the only known way to penetrate and change the cuticle of the hair.There is no organic or natural alternative that will allow for the…

Advancements in polymer chemistry have resulted in a large number of aircraft moving from metallic materials to composite for their primary structures. The definition of a composite states that it is a new material with superior structural properties, which is formed from two or more materials that differ in physical and mechanical behaviour.…

chemically to produce a large chain-like or network molecule (www.britannica.com). Through polymerization, a polymer is produced. A large number of small molecules react to produce a small number of large molecules. The reactant of polymerization is a monomer. Monomers, meaning "one part" or "one member," are small units that make up giant molecules (Exploring Giant Molecules). The product is a polymer. There are two main types of polymerization reactions. They are addition polymerization and…

polyacrylate is a polymer with a unique structure, that chemists are leveraging in a variety of lucrative industrial applications. Sodium polyacrylate possesses a unique chemical property: the ability to absorb incredible amounts of water. It can absorb 300 to 800 times its weight in water (Superabsorbent Polymers). Industrial chemists have taken advantage of the polymer’s special function, and have incorporated it into dozens of different products. In fact, the industry behind superabsorbent…

Polymers Lab - IZOD Impact Test of Notched Polymer Introduction The IZOD impact test is a method used to determine the impact resistance of materials. The main objective of this experiment is to measure the impact strength of three specimens’ material by measuring the amount of the energy required to cause the material to fracture, using Avery Denison 6709 IZOD impact tester. Materials and Methods Apparatus: Three specimens with a machined 45° notch (V-Notch) at room temperature…

1.10. Uses of Lactic acid Lactic acid and some of its derivatives (salts and esters) are used in three main applications: foods, polymers, and industrial. Figure 2: Uses of lactic acid [22] 1.10.1. Food The food industry is the traditional large consumer of lactic acid and lactate salts. It is mainly used as an acidulant and preservative. Lactic acid has a mild acid taste and does not overpower weaker aromatic flavors. Since it occurs naturally, it does not introduce a foreign element into…

parties. They should also realize the common goal of The Vietnam Polymer Company that needs to be achieved at the end. One of the issues overlooked during the decision phase id not understanding the differences between the cultures of two companies and for The Vietnam Polymer Group being the international joint venture, there is a need to develop a common culture setup which is unique to the collaborative venture for the Vietnam Polymer Group including their strategy, mission and vision. The…

concentration is not changing with time (Mangaraj et al., 2009). The transfer of gases and vapors in polymers is realized by mechanisms of diffusion. Diffusion is defined as a flow of matter which originates as difference in chemical potential of migrant material in different locations of the system (Zeman and Kubik, 2007). Whereas, the solubility, S, can be defined as the amount of gas dissolved into the polymer divided by the volume of sample for 1 atm of gas on the sample surface. …

Advantages and Disadvantages of NPV and IRR In any organization, NPV and IRR often use as the tool to examine whether to approve any project and future strategies planning in an organization. However, both of the methods are not absolute to the best as both of the methods have their advantages and disadvantages. NPV techniques measure each contribution to the investors however the drawback of the method is unable to measure the project size. With the IRR technique, the benefit is that it…